Male (Fig. 40), length: 14–17mm. Head: head slightly wider than thorax; vertex 1/3 head width; gena 1/4 of head height, 1/3 of eye height. Fronto-orbital plate dull gray to brilliant silver with three distinct rows of frontal setae, with short black hair-like setulae intermingled with setae, with a few dark colored setulae extending below lowest frontal seta; ocellar setae absent at most several hair-like setulae present on ocellar triangle; one pair of reclinate orbital setae. Parafacial light yellow in ground color, densely covered in silver tomentum making the entire surface reflective and brilliant silver with a light gold sheen; almost bare along parafacial outside facial ridge, with only a small number of setulae extending just below lowest frontal setae; facial ridge setose along 3/4 of its length, with shorth black hair-like setulae emerging along outer edge of row; gena covered in black setulae. Antenna, pedicel black, concolorous with postpedicel; postpedicel black, 4–5X as long as pedicel; arista bare gradually tapering to a point at tip. Vibrissa arising above oral margin by length of 1 pedicel. Palps, yellow orange throughout and densely covered in short black setulae; only slightly clubbed, tapering to a slight point apically, devoid of setulae apically. Thorax: darkened orange ground color, with light gray tomentum throughout pre- and post- suturally, this tomentum tapering off adjacent to scutellum, sometimes bronze brown tomentosity visible confined to postalar callosity; scutellum appearing light yellow-orange to the naked eye, under microscope glabrous adjacent to scutum, abruptly transitioning to dense bronze tomentum which becomes apparent when view on an oblique caudal angle; scutum with four dorsal vittae, one outer pair, one inner pair broken at suture; lateral surface of thorax densely covered in long hair-like setulae, these setulae all black, anepimeron covered bearing the same brown-bronze tomentum present on the scutellum, remainder of pleural surfaces gray tomentose; chaetotaxy: 3–4 strong setae on postpronotum arranged in a line, acrostichal setae 3:3–4; dorsocentral setae 3:4; intra-alar setae 2:3; supra-alar setae 2:3; 4–5 katepisternal setae; scutellum, with 4–5 pairs of long flat marginal setae of subequal length; apical often absent but when present these are short, weak and erect, inserted above the plane of the marginal setae; 2 pairs of median discal scutellar setae. Wing: strongly infuscate, slightly darkened but not orange at wing base, basicosta black with slight accent of orange along caudal edge; both upper and lower calypters also infuscate concolorous with remainder of wing; wing vein R₄₊₅ setose, bearing only 2–3 setulae at base; halteres orange stalk with dark black/brown capitulum. Legs: black overall, covered in shimmering bronze tomentum, coxa on midleg and hindleg covered in black setulae; tarsal claws yellow-orange with black tips, with orange pulvilli subequal to length of tarsal claws; anterodorsal row of setae on hind tibia irregularly sized not fringelike. Abdomen: large, flattened globose, with black ground color, brown lateroventrally on ST1+2–T4; tomentum absent from ST1+2–T3, gold tomentum along anterior >60% of surface of T4 apparent under all lighting angles, not bisected medially by an area devoid of tomentum, densely gold tomentose throughout T5 not reaching to hind margin of tergite, black along caudal 10% of tergite, where it is devoid of gold; ventral surfaces of T3–T5 lightly hirsute; middorsal depression on ST1+2 reaching to hind margin of tergite; one pair of median marginal setae present on ST1+2 and T3, and complete rows of setae on T4 and T5; T5 devoid of any setulae in the area of gold tomentosity.

Male terminalia (Fig. 41): sternite 5 with a deeply excavated median cleft along posterior edge, smoothly Y-shaped, margins covered in dense tomentum; posterior lobes rounded apically, with multiple strong setae surrounded by many shorter weaker setulae. Anterior plate of sternite 5, 1/2 length of posterior lobes; unsclerotized "window" on anterior plate of sternite 5 translucent directly basal to posterior lobes, flattened rectangular with a slight upward arc at extremities. Cerci in posterior view like an isosceles triangle, narrow and parallel sided, slightly longer than surstyli; slightly rounded at apex, medially to fused along most of its length only separate on anterior 1/4. Cerci in lateral view, obclavate with a moderate anterior curve at apex; cerci densely setose along basal 4/5ths. Surstylus in lateral view, wide almost equilateral along its length broadly downcurved, appearing digitiform; surstylus appearing to be fused with epandrium; when viewed posteriorly surstyli slightly convergent, not angled inwards so as to not be clearly visible under cerci when viewed from a caudal angle. Pregonite usually broad, well-developed, apically squared off appearing subrectangular, with 2–3 strong setulae along inner margin. Postgonite, slightly narrowed, 1/3 as wide as pregonite, rounded clublike at apex. Distiphallus broadly cone-shaped with a pronounced flare, with a slender median longitudinal sclerotized reinforcement on its posterior surface not reaching apex and a broad, anterolateral, sclerotized acrophallus, thickened apically appearing clubbed, 1.4X longer than basiphallus.

Female (Fig. 42) length: 15–17mm, overall morphology as in male differing in the following traits: Head: fronto-orbital plate dull gray, sometimes appearing devoid of tomentum along vertex, bearing 4–6 pairs of proclinate orbital setae in addition to 1–2 pairs of reclinate orbital seta; profile of head not rounded as in males; gena 1/3 of head height, and 1/2 of eye height. Thorax: Thoracic chaetotaxy: acrostichal setae 3:4; dorsocentral setae 3:4; intra-alar setae 2:3; supra-alar setae 2:3. Abdomen: more globose than males, lacking the flattened character, setulae on abdomen not as dense appearing far less hirsute than male abdomen; differing in terminalia, and T3 bearing goldish tomentum on ventral surface.

Belvosiaeliethcantillanoae sp. n. can be distinguished from all other Belvosia by the following combination of traits: genal setulae dark, basicosta black, female with palps rounded apically, postpedicel more than 2X longer than pedicel, both calypters dark infuscate, T4 over 60% gold tomentose, cercus narrow and triangular, surstylus narrow and digitiform.

Belvosiaeliethcantillanoae sp. n, is named in honor of Sra. Elieth Cantillano in recognition of her decades of being part of the Parataxonomist Program of Area de Conservación Guanacaste (http://www.acguanacaste.ac.cr) in northwestern Costa Rica (Janzen and Hallwachs 2011). Interim species-specific name included in previously circulating databases and publications, Belvosia Woodley06.

Costa Rica, ACG, Guanacaste Province, 105–550 m elevation.

Belvosiaeliethcantillanoae sp. n. has been reared 97 times from 14 species of Lepidoptera in two families Saturniidae: Periphobaarcaei (Druce, 1886) (N=1) and Sphingidae, Aelloposfadus (N=1), Agriuscingulata (Fabricius, 1775) (N=4), Amphonyxduponchel Poey, 1832 (N=2), Cocytiusanteus (Drury, 1773) (N=1), Lintneriamerops (Boisduval, 1870) (N=3), Manducadilucida (Edwards, 1887) (N=67), M.florestan (Stoll, 1772) (N=2), M. Janzen01 (N=1), M.muscosa (Rothschild & Jordan, 1903) (N=6), M.occulta (Rothschild & Jordan, 1903) (N=1), M.rustica (Fabricius, 1775) (N=4), M.sextaDHJ03 (N=1), Neococytiuscluentius (Cramer, 1776) (N=2) in rain forest, dry forest, and dry-rain lowland intergrade.