88 



UNITED STATES NATIONAL MUSEUM BULLETIN 224 



femora dense, fine, short, appressed and setate. The 

 following complement of bristles present: 8 or 9 ven- 

 trolateral bristles on the hind femur, all short and 

 rather weak, 2 of these on the outer fourth distinctly 

 stouter than the remainder; there is a short, stout 

 dorsolateral at the apical fifth and a shorter, weaker 

 bristle dorsomedially near the apex; hind tibia with 

 4 or 5 fine, short, dorsomedial, 4 stout dorsolateral, 2 

 longer, stout lateral, of which one is near the base and 

 one near the apex, and 5 or 6 longer ventrolateral 

 bristles. Apex with a dorsomedial, 3 or 4 weak medial, 



1 dorsolateral, 1 long lateral, 1 ventrolateral with 1 or 



2 short bristles above it, and 4 ventral bristles. Middle 

 femur with 1 long slender anterior bristle just beyond 

 the middle and some long, slender, ventral hairs; its 

 tibia has 4 long, slender, anteroventral, 1 single, long 

 anterior bristle at the basal third, 6 or 7 anterodorsal, a 

 like number of posterodorsal, 6 or 7 short posterior, 

 and 4 long posteroventral bristles. Anterior femur 

 with numerous, moderately long, stiff hairs ventrally 

 and somewhat shorter hairs posteriorly; its tibia has 

 6 or 7 short anterodorsal, 5 or 6 similar posterodorsal, 

 6 slender posterior bristly hairs, and 4 long slender 

 posteroventral bristles; apex without spine. Anterior 

 basitarsus short and stout, not as long as the 2 succeed- 

 ing segments ; tarsi with stout, sharp slaws, well devel- 

 oped pulvilli, and a long blade-like empodium. 



Wings: The wings are broad, marginal cell widely 

 open ; anterior branch of third vein strongly sigmoid, 

 arising at a right angle and with second submarginal 

 cell unusually swollen at base. First and fourth pos- 

 terior cells closed with a long stalk; anal cell closed 

 and stalked; middle end vein of the second basal cell 

 long; the anterior crossvein enters the discal cell well 

 before the middle; the alula is large, the ambient vein 

 is absent, the costa ending well before the apex of the 

 wing. 



Abdomen: The abdomen is robust, distinctly wider 

 than thorax. The tergites are flattened across the mid- 

 dles and six tergites are present in the female, the sev- 

 enth and eighth each extremely short, concealed in dor- 

 sal view but very narrowly protruding laterally; the 

 sixth tergite is three- fourths as long as the fifth; the 

 seventh and eighth each about one-seventh as long as the 

 sixth. Lateral margins of the tergites slightly convex; 

 posterior incisures notched. Pile of abdomen abundant, 

 but exceptionally short and fine and appressed, the 

 surface granulate but not punctate. In the type of 

 genus there are transverse pollinose spots, 4 on each 

 tergite. Sides of the first tergite with quite short pile 

 and 5 short bristles. Second tergite with 4 bristles lat- 

 erally, the third tergite with 3, the fourth and fifth ter- 

 gites each with 2 short bristles. Female terminalia very 

 short and produced posteriorly as a short, slender, yel- 

 low lobe cupped and hollowed beneath. All the stern- 

 ites with short, abundant pile. Male not seen by author. 

 Distribution: Palaearctic. Glyphotriclis ornatus 

 Schiner (1868), from Gibraltar. 



Genus Scytomedes Hermann (ex Loew) 



Figubes 42, 440, 899, 90S, 1S63 



Scytomedes Loew in Stein, Stettiner Ent. Zeitung, vol. 42, p. 

 490, 1881. Nomen nudum. 



Scytomedes Hermann, Zool. Jahrb., vol. 43, p. 187, 1920. Type 

 of genus: Asilus haemorrhoidalis Fabricius. 1794, desig- 

 nated by Roeder, 1SS2, as Scytomedes menstruus Boeder (ex 

 Loew) in Roeder, 18S2, as a cabinet name in the Loew col- 

 lection. Validated by Hermann, 1920. 



Small, robust asilids related to Tricl'm Loew but dis- 

 tinguished by a short face, by a long, slender antenna, 

 the segregation of the face pile into short hairs dorsally 

 and bristles ventrally, and the quite short, curled wiry 

 and appressed mesonotal pile. Length 11 mm. 



Head, lateral aspect : The head is not extended below 

 the eye. The face is rather short, nearly straight in 

 profile, a little more conspicuous ventrally, due to the 

 posterior recession of the eye. Eye of moderate length, 

 strongly and evenly convex anteriorly, gently convex 

 behind. The occiput is short but slightly more devel- 

 oped below, due to a short, moderate, anteroventral re- 

 cession of the eye; occiput obliterated dorsally. The 

 pile of the occiput is rather scanty, moderately long and 

 stiff ventrally, with only a few hairs dorsally along the 

 eye margins; on the upper half are 12 pairs of rather 

 stout bristles, the middle ones proclinate. Proboscis 

 short, distinctly compressed towards the apex, but only 

 slightly over the middle portion, the base from the ven- 

 tral aspect distinctly swollen subbasally. The apex is 

 very bluntly rounded, a low dorsal ridge present in the 

 middle; the apex bears a few stiff hairs, the basal half 

 of the ventral surface has numerous, long, fine hairs 

 that continue around the lower lateral half of the 

 proboscis; the proboscis is held nearly straight for- 

 ward. Palpus small, slender, cylindrical, of two seg- 

 ments, the first segment short and excavated, the sec- 

 ond not porate, bearing a few apical bristles. The an- 

 tenna is attached at the dorsal fourth of the head ; it is 

 distinctly elongate and slender, and all the segments 

 are subcylindrical or at most slightly compressed. The 

 first segment is long, at least twice as long as the second 

 segment. The third segment (microsegment excluded) 

 is l x /2 times as long as the first segment, and bears a 

 quite short annulate or disclike microsegment. To this 

 short microsegment is attached a much longer, apically 

 rounded, second microsegment, equally robust but 

 slightly tapered apically, which carries a dorsal, elon- 

 gate, spoonlike depression in which is a concealed spine. 

 First segment with numerous, suberect, bristly setae 

 dorsally and long bristles ventrally, both slender and 

 stout. Second segment with only scanty short setae. 

 Head, anterior aspect : The width of the head is about 

 11/2 times the height. The face below the antenna is 

 nearly half the head width and the sides are nearly par- 

 allel, and actually slightly narrowed in the middle. 

 The front is widened at the vertex. Subepistomal area 

 of moderate size, but only slightly oblique, concave and 

 mostly shining. The face is pubescent with a subocular, 

 vertical stripe of long, appressed, coarse pubescence; 



