1	Dorsal surface of labrum with submarginal arc of simple setae (Fig. 2a)	(numeratus group) 2
–	Dorsal surface of labrum with submarginal arc of other types of setae	7
2	Setae at apex of mola of left mandible absent (Fig. 11d)	L. lachicae sp. nov.
–	Setae at apex of mola of left mandible present	3
3	Hypopharynx with medial tuft of stout setae poorly developed (Fig. 2t); mola of right mandible proximally beginning with a double hump (Fig. 13b)	4
–	Hypopharynx with medial tuft of stout setae well developed, short (Fig. 2s); mola of right mandible proximally not beginning with a double hump	5
4	Posterior margin of tergum IV with triangular spines (Fig. 16c)	L. sabordoi sp. nov.
–	Posterior margin of tergum IV with rounded spines (Fig. 14c)	L. palawano sp. nov.
5	Left mandible with comb-shaped structure at base of mola (Fig. 5f, g)	6
–	Left mandible without comb-shaped structure at base of mola (Fig. 9d)	L. camiguinensis sp. nov.
6	Paraproct with 18–21 marginal spines	L. aldabae sp. nov.
–	Paraproct with 29–34 marginal spines plus a few submarginal spines	L. acei sp. nov.
7	Dorsal surface of labrum with submarginal arc of clavate setae (Fig. 2c)	(sumigarensis group) 8
–	Dorsal surface of labrum with submarginal arc of other types of setae	13
8	Labial palp segment II enlargement pronounced hook-like with inner margin straight, segment III oblong and apically slightly truncate (Fig. 28c)	L. sumigarensis
–	Labial palp different	9
9	Labial palp segment II elongate thumb-like with distal margin strongly concave and inner margin concave (Figs 31i, 33h)	10
–	Labial palp segment II broad thumb-like with distal margin not or only slightly concave (Fig. 29i)	11
10	Labial palp segment III apically slightly pointed (Fig. 31i); maxillary palp longer than galea-lacinia (ca. 1.3×) (Fig. 31h)	L. delocadoi sp. nov.
–	Labial palp segment III apically rounded (Fig. 33h); maxillary palp much longer than galea-lacinia (ca. 1.7×) (Fig. 33g)	L. freitagi sp. nov.
11	Paraproct distally not expanded (Fig. 27c); distolateral process at scape poorly developed (Fig. 2g)	L. molawinensis
–	Paraproct distally expanded (Fig. 30e); distolateral process at scape absent (Fig. 2f)	12
12	Maxillary palp with distolateral excavation (Fig. 29h); dorsal surface of labrum with submarginal arc of 17–21 clavate setae (Fig. 29a)	L. baganii sp. nov.
–	Maxillary palp with slight distolateral excavation (Fig. 35g); dorsal surface of labrum with submarginal arc of 15–17 clavate setae (Fig. 35a)	L. pelingeni sp. nov.
13	Dorsal surface of labrum with submarginal arc of lanceolate setae (Fig. 2e)	(vallus group) 14
–	Dorsal surface of labrum with submarginal arc of other types of setae	15
14	Dorsal surface of labrum with submarginal arc of ca. three lanceolate setae; row of fine setae at innermost denticle of kinetodontium of right mandible absent (Fig. 37b)	L. giselae sp. nov.
–	Dorsal surface of labrum with submarginal arc of one plus ca. eight lanceolate setae; row of fine setae at innermost denticle of kinetodontium of right mandible present (Fig. 39b)	L. mendozai sp. nov.
15	Dorsal surface of labrum with submarginal arc of feathered setae (Fig. 2b), feathers may be reduced or strongly reduced; labial palp segment II enlargement thumb-like, segment III conical (Fig. 2j); femoral patch absent	(operosus group) 16
–	Dorsal surface of labrum with submarginal arc of dendritic setae (Fig. 2d); labial palp segment II enlargement narrow, elongate thumb-like, segment III apically rounded (Fig. 3j); femoral patch present (Fig. 4a)	(dendrisetis group) L. dalisay sp. nov.
16	Dorsal surface of labrum with submarginal arc of setae with reduced or strongly reduced feathers (Figs 17b, 21b)	17
–	Dorsal surface of labrum with submarginal arc of feathered setae, feathers not reduced (Fig. 19a)	18
17	Feathered setae of submarginal arc on dorsal surface of labrum strongly reduced, with few lateral branches only (Fig. 17b); hind protoptera well developed (Fig. 18g)	L. gamay sp. nov.
–	Feathered setae of submarginal arc on dorsal surface of labrum moderately reduced (Fig. 21b); hind protoptera of medium size (Fig. 22g)	L. tagbanwa sp. nov.
18	Labial palp segment II enlargement narrow thumb-like (Fig. 19h); row of fine setae at innermost denticle of kinetodontium of right mandible absent (Fig. 19b)	L. pangantihoni sp. nov.
–	Labial palp segment II enlargement broad thumb-like (Fig. 23h); row of fine setae at innermost denticle of kinetodontium of right mandible present (Fig. 23b)	19
19	Fore tarsus dorsoventrally concave (broadened) (Fig. 24a); spines at posterior margin of tergum IV shorter than wide (Fig. 24c)	L. valdezorum sp. nov.
–	Fore tarsus dorsoventrally parallel sided (Fig. 26a); spines at posterior margin of tergum IV mainly longer than wide (Fig. 26c)	L. wantzeni sp. nov.