12 STUTTGARTER BEITRAGE ZUR NATURKUNDE Ser. A, Nr. 622 

Figs 19-26. Diatrichalus spp., male genitalia. - 19. D. proprius sp. n.; — 20. D. piper sp. n.3—21. 
D. cyanescens; — 22. D. metallicus sp. n.; — 23-24. D. xylobanoides; - 25. D. biroi 
sp. n.;- 26. D. schawalleri sp. n. — Scales: 0.5 mm. 
small, with apparent antennal tubercles followed by transverse depression, eyes rel- 
atively small, interocular distance 1.44 times longer than maximum eye diameter, 
apical segment of maxillary palpi with numerous tiny tubercles, antennae slender, 
acutely serrate (Fig. 50). Pronotum transverse, pronotum 1.50 times wider than long 
at midline, basal angles acutely projected, tubercles at the basal third of lateral mar- 
