DASVrOGONINAE 



ROBBER FLIES OF THE WORLD 



87 



pressed, dense, pale pile but without special bristles and 

 remaining tergites without bristles. The pile is abun- 

 dant, flat appressed, moderately long dorsally, becom- 

 ing much more abundant, longer and flat appressed 

 laterally and extending over the edges as posteriorly 

 directed fringes. The second tergite is creased across 

 the middle and apparently simulating two segments; 

 on this assumption there are six long tergites, the sev- 

 enth being rather short but only partially concealed by 

 the sixth. Terminalia rather short and inconspicuous. 

 Sternites with only long tufts of pile. Postmetacoxal 

 area membranous. Lateral metasternal slopes bare but 

 with a few hairs above at the extreme upper posterior 

 part. The female terminalia are partially visible ex- 

 ternally but are inconspicuous and have no spines. 



Through the courtesy of the "Vienna Museum a fe- 

 male type of Wiedemann's species of this genus was 

 studied. 



Distribution: Palaearctic: Hoplotriclis pallasii 

 Wiedemann (1828). 



Genus Glyphotriclis Hermann 



Figures 31, 434, 875, 884, 1892 



Glyphotriclis Hermann, Zool. Jahrb., vol. 43, p. 1S6, 1920. Type 

 of genus: Triclis ornatus Schiner, 18G8, by original 

 designation. 



Small, compact, quite robust flies, the pile short, 

 strongly appressed and setate. The tergites laterally 

 bear short, stout bristles, the face is quite wide, long 

 pilose throughout its length, without bristles. The first 

 posterior cell of the wing is closed with a rather long 

 stalk and all of the marginal veins are evanescent. 

 Length 9 or 10 mm. 



Head, lateral aspect: Length of head one-half the 

 height. The face is prominent, very gently convex and 

 rather more strongly convex from the dorsal aspect. 

 The eye is of average length, slightly more narrow 

 below, due to a moderate ventral recession which begins 

 near the middle of the head. The occiput is thick and 

 rather tumid, but chiefly over the submedial and middle 

 portion from which point it slopes gently down to the 

 eye. It is prominent ventrally but much less so on the 

 dorsal fifth. The pile of the occiput is rather abundant 

 but coarse and confined to the middle and lower portion, 

 being replaced above on the upper third by 10 pairs of 

 moderately stout, long bristles. The proboscis is di- 

 rected forward, exceptionally short, shorter than the 

 face, stout and robust; it is subcylindrical on the outer 

 half but with the basal half rather flared and laterally 

 swollen below. The apex is sharply truncate ventrally 

 in an oblique direction; it bears numerous, short, fine 

 hairs on the truncate portion. Base of proboscis with 

 numerous, long, fine hairs. Palpus clearly of two seg- 

 ments, the first segment rather larger and a little longer 

 than the second ; second short, cylindrical, slightly nar- 

 rowed at the apex and bearing 5 or 6 bristles set close 

 to the apex. The antenna is attached to the upper third 

 of the head and comparatively short. The first seg- 



535914— 62— pt. 1 7 



ment is slightly longer than the second, swollen ven- 

 trally; the second segment is beadlike; the third 

 segment, with the short microsegments included, is 1% 

 times the combined length of the first two segments. 

 Third segment thick, rather swollen, and laterally a 

 little wider distally than at the middle or base. It 

 bears a single, quite short, thick, stubby microsegment, 

 in the center of which is a distinct, short, stubby spine. 

 Pile of first segment abundant, long and fine ventrally, 

 shorter dorsally, and with 2 or 3 long, stout ventro- 

 lateral bristles ; second segment with a few short setae. 

 Head, anterior aspect : Face below antenna a little 

 more than a third the head width and divergent below. 

 Subepistomal area smafl, nearly horizontal, deeply con- 

 cave and bare. Genofacial grooves deep but wide. 

 Face densely pubescent and densely long, fine pilose, 

 without bristles though the ventral pile may become 

 somewhat stouter and the pile on the lower third of the 

 face is a little longer and is continued down the upper 

 half of the subepistomal margins to the eye corners. 

 The front is short, micropubescent, slightly divergent 

 with numerous long, fine bristly hairs laterally. Ver- 

 tex deeply excavated with obliquely sloping sides, the 

 ocellarium large, wide, comparatively low and bearing 

 across the middle 6 to 8 pairs of long, slender bristles 

 or bristly hairs. Anterior eye facets strongly enlarged. 



Thorax : The thorax is appressed micropubescent on 

 the whole pleuron, but only anteriorly and laterally 

 on the mesonotum, which is otherwise shining. Pile of 

 mesonotum dense, short, curled, appressed and setate. 

 There is a narrow apilose band down the middle of the 

 somewhat wrinkled, granulate surface. Dorsocentral 

 and acrostical bristles not differentiated. Over the 

 whole posterior fourth of the mesonotum occasional 

 hairs stand out as a little longer, but irregularly. The 

 following complement of short, moderately stout 

 bristles present laterally : 2 notopleural, 2 supraalar, 2 

 postalar, and no scutellar. Scutellum thick and con- 

 vex, the surface granulate with short, curled, setae, the 

 base with a deep crease. Propleuron with abundant, 

 long, fine pile, including the collar, which is low, short, 

 and inconspicuous; bristles absent. The upper pos- 

 terior and anterior sternopleuron, posterior half of 

 the mesopleuron, upper half of the pteropleuron, and 

 anterior half of the posthypopleuron are all with 

 numerous, long, fine hairs. Metapleuron strongly pro- 

 tuberant, with a wide band of still more numerous, 

 longer, stiff hairs. Lateral metanotal slopes bullose 

 and micropubescent only. Lateral slopes of metaster- 

 num and ventral metasternum with abundant, long, 

 fine pile; postmetacoxal area membranous; tegula 

 micropubescent. 



Legs : All the femora stout without being in the least 

 swollen. Middle femur slightly more slender than the 

 remaining pairs. The hind tibia is distinctly swollen 

 distally, beginning at the base and at the apex nearly 

 twice as wide as the base. Ventral surface of hind 

 femur and tibia with a very dense fringe of fine, mod- 

 erately long, erect pile; brush of setae absent medially, 

 except at the extreme apex. Dorsal pile of all the 



