Degeeria. 551 



138. Degeeria Meig. 



Small or medium sized species of black colour with whitish 

 pruinosity. Head fully as broad as thorax, behind somewhat flat 

 above, more convex and puffed out below, higher than long. Frons 

 somewhat narrow in male, broader in female, somewhat protruding. 

 Jowls not broad, at most one fourth of the height of the eye. In both 

 sexes ocellar bristles, fine in the male, and inner vertical bristles, 

 in female sometimes also outer verticals; in male one or two fine and 

 not very distinct orbital bristles, in female two normal orbitals. A 

 pair of long and fine postocellar bristles, shorter in female. Behind 

 postocular bristles more or fewer black hairs. Frontal bristles descend- 

 ing to end of second antennal joint or about, a number of the upper 

 reclinate. Gheeks bare. Vibrissæ ascending to the middle or a little 

 above. Eyes bare. Epistoma only a little retreating and not reflected 

 below. Proboscis medium long; palpi thread-like. Antennæ inserted 

 at middle of the eye, third joint three to four times as long as second; 

 arista with second joint not or slightly elongated. Thorax about 

 quadratic; three postsutural dorsocentrals and two præ- and three 

 postsutural acrostichals; a præsutural intraalar bristle present {col- 

 laris) or indistinct or wanting (luctuosa); one posthumeral bristle. 

 Scutellum with three marginal bristles on each side, the median 

 diverging; no apical bristles. Two or three sternopleural bristles. 

 Pteropleura with a little bundle of small hairs above. Abdomen 

 elongated, oylindrical, in female more ovate; excavation on second 

 segment nearly or quite reaching hind margin; there are discai and 

 marginal bristles, on second segment a pair of marginal; fifth seg- 

 ment with bristles on apical half. Male genitalia small; abdomen in 

 female apparently ending with a spatula-like plate. Legs in male 

 somewhat long and slender, more robust in female; claws and pulvilli 

 elongated in male. Wings with first posterior cell narrowly open, 

 ending very near apex of wing; discai angle rounded; no costal spine. 



D. luctuosa has been bred from Microlepidoptera, collaris from 

 Galerucella. 



Of the genus four European species are recorded in the Kat. 

 palåarkt. Dipt., but besides there is a number of not interpreted 

 species perhaps belonging here; of the four species one, muscaria 

 Fall. probably is identical with Vibrissina sordidisquama Zett., see 

 under this species. 



