Fore wing with one black band; mid tibia black basally and distally, yellow at mid-length.

Holotype: female. Body length 4.3 mm. Fore wing length 4.3 mm. Fore wing with one black band. Scutellar sulcus with one median longitudinal carina. Median areola of propodeum with well-defined margins. Anterior transverse carina of propodeum absent. Lateral longitudinal carinae of median tergite 1 well-defined. Median syntergite 2+3 1.3 times longer than wide. Ovipositor longer than metasoma, but shorter than body.

Unknown.

Lytopylus hartmanguidoi is named in honor of Hartman Guido in recognition of his participation in the collaborative development of the ICE-ACG geothermal project of Pailas II, northwestern Costa Rica.

Reared five times from three species leaf-tiers in the Depressariidae, feeding on mature leaves of Hiraea reclinata (Malpighiaceae) at the intersection of the ACG dry forest and rain forest ecosystems at 540 m elevation.

Holotype ♀: Costa Rica, Area de Conservaciόn Guanacaste, Alajuela, Sector San Cristobal, Tajo Angeles, 10.86472N -85.41531W 540m., Elda Araya coll., food plant: Malpighiaceae Hiraea reclinata, host caterpillar: Depressariidae, subfamily unknown, elachJanzen01 Janzen392, coll. date: 4/27/2010, parasitoid eclosion date: 5/19/2010, DHJPAR0039524. Paratypes: [the following have the same data as the holotype except as indicated] ♀, Gloria Sihezar coll., host caterpillar: Psilocorsis Janzen369, coll. date: 4/20/2010, parasitoid eclosion date: 5/15/2010, DHJPAR0039513. ♀, Gloria Sihezar coll., parasitoid eclosion date: 6/4/2010, DHJPAR0039514. ♀, Gloria Sihezar host caterpillar: Depressariidae, Stenomatinae, Antaeotricha Janzen126. 1/10/2011 2/6/2011, DHJPAR0042831. [same as previous except as coll. date and eclosion date] ♀, coll. date: 1/13/2011, parasitoid eclosion date: 2/8/2011, DHJPAR0042844.