Catharosia. 261 



48. CatHaposia Rond. 



Small, black species. Head broader tlian thorax, nearly flat behind, 

 much liigher than long. Frons in male quite narrow, in female broad, 

 not protruding, rounded in profile. Jowls narrow. In both sexes 

 ocellar and inner vertical bristles, in female also two orbital bristles 

 placed rather downwards. Frontal bristles reaching fully to insertion 

 of antennæ, in female a strong reclinate bristle above. Cheeks bare. 

 Vibrissæ not ascending. Eyes bare. Epistoma almost not retreating, 

 low, a little hollowed. Proboscis and oral cone sliort; clypeus horse- 

 shoe-shaped. Palpi thread-like, a little dilated at apex. Antennæ 

 inserted at about middle of the eye, short, third joint about as long 

 as second; arista bare. Thorax a little rectangular; three fme post- 

 sutural dorsocentrals in male, but in female only the posterior present; 

 no acrostichals ; two intraalar bristles. Scutelliim with two marginal 

 bristles on each side, the apical crossing, but in female very small 

 or wanting. Two sternopleural bristles besides hairs. On pteropleura 

 above a single small bristle. Abdomen elongated oval; excavation 

 on second segment only present at base. There are marginal bristles 

 in male, none on second segment, and in female no bristles at all. 

 Male genitalia relatively large, lying ventrally below apex; in female 

 the last segments form a somewhat claw-like ovipositor lying in a 

 ventral groove in sixth and fifth segment, the groove bordered in 

 front by the (as far as I can see) fourth sternite which is cleft in the 

 middle and covered with short spinules. Legs medium long, with 

 moderate bristles, small in female; hind tibiæ a little thickened on 

 middle part; tarsi short; claws and pulvilli small and about equal 

 in both sexes. Wings somewhat narrow; first posterior cell long- 

 petiolate, ending at apex of wing; discai angle rectangular but the 

 angle itself rounded; no costal spine. Squamulæ small, 



The development is not known; the formation of the female 

 ovipositor induces the supposition that the species belongs to Pantel's 

 group 8 or 9, 



Of the genus 4 palæarctic species are known, one occurs in Den- 

 mark. 



1. C. pygmaea Fall. 



1820. Fall. Dipt. Suec. Rhizom. 4, 5 {Thereva). — 1824. Meig. Syst. 

 Beschr. IV, 200, 27 (Phasia). — 1844. Zett. Dipt. Scand. III, 1253, 10 (Phasia). 



— 1891. B. B. Denkschr. Akad. Wiss. Wien, LVIII, 358 et 1893. LX, 193, 80. 



— 1894. Pand. Rev. Entom. XIII, 83, 1 {Lithophasia). — 1907. Villeu. Ann. 



