BOCAK, REVISION OF DIATRICHALUS FROM NEW GUINEA 17 
Description: d. Medium sized, body dark brown to black, pronotum with 
dark ochre lateral margins and darker disc, elytra dark ochre. Head and pronotum 
with ligth brown pubescence. Head small, antennal tubercles flat, eyes hemispheri- 
cally prominent, interocular distance 1.05-1.14 times longer than the maximum eye 
diameter, antennae slender, acutely serrate, apparently compressed (Fig. 49). Prono- 
tum small, widest at base, 1.4-1.5 times wider than long at midline, lateral margins 
with flat but apparent tubercles, posterior angles acutely projected, disc shining. 
Elytra slightly widened posteriorly, primary costa 1 shorter than one sixth of elytral 
length, primary costa 3 apparently shortened, secondary costae weak, transverse 
costae irregular, forming quadrate to longitudinal elytral cells. Male genitalia tubular 
at the base, with apparent ventral process (Fig. 9). 2: unknown. 
Measurements: Length of body 6.60-7.55 mm, width at humeri 1.40-1.54 mm, 
length of pronotum 0.70-0.75 mm, width of pronotum 1.07-1.09 mm. ¢: interocu- 
lar distance 0.31 mm, maximum diameter of eyes 0.35 mm. 
Distribution: New Guinea, known only from the type locality. 
3.12. Diatrichalus humeralis sp. n. (Fig. 30) 
Type material: Holotype d, New Guinea: NE. Wau, 1750-1900 m, leg. J. & M. SEp- 
LACEK (BPBM). 
Name derivation: Named according to the ligth brown coloration of humeri. 
Differential diagnosis: D. humeralis and D. sedlacekiae are the only New 
Guinean species of this genus with brown body and yellowish white humeral two 
fifths of the elytra but they differ by the shape of the male genitalia (Figs 14, 30), rel- 
ative size of eyes and other characters. The shape of male genitalia shows some rela- 
tionship of D. humeralis to D. fasciatus and D. bipunctatus. 
Description: d. Body medium sized, slightly widened posteriorly, brown, on- 
ly elytra with humeral two fifths yellowish white. Head small, with large, hemi- 
spherically prominent eyes, maximum eye diameter 1.06 times longer than interoc- 
ular distance, antennal tubercles prominent, followed with deep transverse depres- 
sion, surface of head shining, covered with dense brownish pubescence. Maxillary 
palpi with robust tubercles at outer margin, antennae serrate. Pronotum transverse, 
widest at base, 1.50 times wider than long at midline, lateral margins elevated, with 
small tooth at basal third, surface densely pubescent, shining. Elytra with stout pri- 
mary costae, costa 1 reaching one fifth of elytral length, costa 3 shortened apically, 
secondary costae very weak, shape of elytral cell variable, in average quadrate. Male 
genitalia as in fig. 30. 2: unknown. 
Measurements: Length of body 9.6mm, width at humeri 2.1mm, length of 
pronotum 1.01 mm, width of pronotum 1.51 mm. d: interocular distance 0.73 mm, 
maximum diameter of eyes 0.78 mm. 
Distribution: New Guinea, known from the type locality only. 
3.13. Diatrichalus mancus (Kleine, 1926), comb. n. (Fig. 18) 
Trichalus mancus Kleine, 1926 (KLEINE, 1926: 176). 
Type material: Holotype 2, “Nieuw. Guinea, Expeditie 1904/5, Etna-baai” (ZMPA, 
type No. 929). — Paratypes: d ¢, same data as holotype: — d; Nieuw. Guinea, Merauke, Dr. 
Koch, 1904-5 (ZMPA). 
