18 STUTTGARTER BEITRAGE ZUR NATURKUNDE Ser. A, Nr. 622 
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Figs 35-42. Diatrichalus spp., male genitalia. - 35-37. D. cyanescens; — 38. D. parallelus sp. n.; 
— 39. D. aeneus sp. n.; — 40. D. sinuaticollis sp. n.; — 41-42. D. dilatatus sp. n. — 
Scales: 0.5 mm. 
Differential diagnosis: D. mancus differs from remaining New Guinean 
species of Diatrichalus by the unique colour pattern. The combination of yellow 
dorsal part of the body with black apex of the elytra is often encountered in Aus- 
tralian representatives of the genera Trichalus and Microtrichalus, but it is not fre- 
quent in New Guinea. 
