BOCAK, REVISION OF DIATRICHALUS FROM NEW GUINEA 25 
Description: d. Body medium sized, brown, only humeral half of elytra yel- 
low. Head small, with apparent antennal tubercles, surface shining, sparsely pubes- 
cent, eyes hemispherically prominent, their interocular distance 1.63 times longer 
than maximum eye diameter, antennae slender, acutely serrate, maxillary palpi with 
numerous tiny tubercles at outer margin of last segment. Pronotum small, widest at 
base, 1.5 times wider than long at the midline, surface partly shining, with dense pu- 
bescence. Elytra slightly widened posteriorly, first primary costa reaching only one 
sixth of elytral length, costa three shortened, reaching five sixth only, primary costae 
very stout, secondary much weaker, reticulate cells quadrate. Male genitalia with 
small and relatively simple internal sac and apparent projection ventrally (Fig. 14). 
2: unknown. 
Measurements: Length of body 7.4mm width at humeri 1.80 mm, length of 
pronotum 0.84 mm, width of pronotum 1.26mm. d: interocular distance 0.54mm, 
maximum diameter of eyes 0.33 mm. 
Distribution: NE New Guinea, known from the type locality only. 
3.23. Diatrichalus sinuaticollis (Pic, 1923), comb. n. (Fig. 40) 
Trichalus sinuaticollis Pic, 1923 (Pic, 1923: 36) 
Type material: Holotype 2, “New Guinea” (MHNP). 
Other material examined: d, Papua, Fly R., Kiunga, 35 m, VIII. 1959, J. &. M. Sep- 
LACEK; — 6, Nabire, Geelvink Bay, 5-50 m, 25. VIII.-2. IX. 1962, J. SEDLACER; — 3, Vo- 
gelkopf, Bombeni, 700-900 m, 10. VI. 1959, T. C. Maa; — d, Wau, 1200-1300 m, 14. IX. 1963, 
J. SEDLACEK; — 6, Lae, Singuawa R., 30 m, 15. IV. 1966, Wirxes (BPBM, LMBC). 
Differential diagnosis: Similar to D. schawalleri by the size of eyes and gen- 
eral appearance, but differs substantially by the shape of the male genitalia (Fig. 40). 
Redescription: d. Body small to medium sized, nearly parallel-sided, dark 
brown. Head small, with large eyes, maximum eye diameter 1.05 times bigger than 
interocular distance, antennal tubercles apparent, head shining, densely pubescent, 
maxillary apical segment broad, with robust tubercles at outer margin, antennae ser- 
rate. Pronotum 1.4 times wider than long at midline, with weak lateral tooth. Elytra 
with three fully developed primary costae, costa 1 reaching one fifth of elytral 
length, only slightly shortened costa 3, secondary costae weak, but seldom inter- 
rupted. Phallus robust, parallel-sided (Fig. 40). 
Measurements: Length of body 6.25 mm, width at humeri 1.54 mm, length of 
pronotum 0.83 mm, width of pronotum 1.20mm. d: interocular distance 0.44mm, 
maximum diameter of eyes 0.46 mm. 
Distribution: New Guinea, widely distributed, but not common, most speci- 
mens collected in lowland areas. 
3.24. Diatrichalus striatus sp. n. (Fig. 28) 
Type material: Holotype 6, Irian Jaya, Jayawijaya Prov., Wamena, Pronggoli, 
2000-2400 m, 17.-19. IX. 1991, leg. A. Rıeper (SMNS). - Paratype: 3, same data (SMNS). 
Name derivation: Named according to the colour pattern of the elytra. 
Differential diagnosis: D. striatus is very characteristic in the shape of body 
and light humeri and the interspace between primary costa 2 and 4 ın basal two 
thirds of elytral length. Such pattern has not been found in any other Diatrichalus 
