588 



UNITED STATES NATIONAL MUSEUM BULLETIN 22 4 



side of which are bare, pollinose stripes. Lateral por- 

 tion of the mesonotum with fine, erect, scattered pile. 

 Humerus pilose. The lateral bristles consist of 2 strong 

 notopleural, 1 supraalar, and a double row of 5 widely 

 separated, long, slender prescutellar bristles. Scutel- 

 liun with impressed rim and convex ; the margin bears 

 fine hairs and has 2 longer, extremely weak hairs, wliich 

 can hardly be classed as bristles. Mesopleuron pilose 

 above ; pteropleuron with pile above, hypopleuron with 

 a single, long, bristly hair and with some fine, scattered, 

 short hairs above. Metapleuron with a band of long, 

 fine hairs, the slopes of the metanotum pilose. 



Legs : The liind femur is slightly thicliened gradually 

 from the base with a pair of preapical dorsal bristles, 1 

 lateral bristle at the basal third, 2 ventrolateral bristles, 

 1 at the basal third and 1 at the apical third and 1 long, 

 ventral bristle quite close to the base, with a medial 

 bristle adjacent. The liind tibia bears rather dense pile 

 of moderate length dorsally and ventrally and with 2 

 bristles near the middle dorsally, 2 dorsally at the 

 extreme base, 1 at the apex, 1 stout apical bristle ventro- 

 laterally, and 2 lateral bristles near the middle ; middle 

 femur with the bristles somewhat longer and stouter 

 and microtuberculate ; it has 3 anteriorly along the 

 middle, 3 especially well developed ventrally fi-om near 

 the base to just beyond the middle, and 3 at base and 

 middle which are ventromedial in position. Middle 

 tibia with a pair of long, ventral bristles well developed 

 at tlie outer fourth, a still longer, mipaired, ventral 

 bristle just beyond the middle, and with 1 long ventral 

 apical pair of bristles. Dorsally there is a single, short 

 bristle in the middle. Anterior femur with a group of 

 3 rather long, stout bristles ventral in position, quite 

 close to the base and followed by about 5 slender, stiff 

 hairs down the middle of the ventral surface, one of 

 which is longer than the others. Anterior tibia with 1 

 quite long, ventral apical bristle and with 2 long, stout, 

 posterior bristles at the basal and apical third. An- 

 terior basitarsus is notable for 2 imusually long bristles 

 posterior in position at base and apex. 



Wings: The ambient vein complete, including the 

 alula. 



Abdomen : The abdomen is tapered and subcylindri- 

 cal ; the postmargins of the tergites bear a row of 6 or 7 

 moderately long, stiff hairs or extremely weak bristles. 

 Sternites without distinct bristles. Male terminalia 

 very similar to Cinadvs Wulp in general type of con- 

 struction. It is large, stout and conspicuous, with the 

 superior forceps deeply bisected posterolaterally. Fe- 

 male unknown. Male known only from Java. 



Cobalomyia, new genus 

 FiGUKES 385, 799, 1550, 1560, 2202, 2216, 2448, 2449 



Type of genus : Senoprosopis fanovanensis Bromley, 

 1942. 



Medium size flies, related to Cinadus Widp ; the an- 

 tennal style is much shorter. The male tei-minalia dis- 



tinctly small and inconspicuous and the female is with- 

 out bristles on the seventh sternite. The posterior 

 branch of the third vein is only very slightly and gently 

 undulate. Length 18 mm. 



Head, lateral aspect: The head is rather short; the 

 face is plane with the eye on the upper half, moderately 

 and gently produced below and more conspicuous on 

 account of the ventral recession of the eye. Cheeks 

 moderately high. The occiput in profile is very short, 

 especially below and only a little longer above. It 

 bears dense, short, stiff hairs below, longer at the lower 

 eye corner where they are almost bristly, and at the 

 upper eye comer are 5 pairs of stout, short, slightly 

 curved bristles. Proboscis stout, swollen at the base 

 and pointed at the apex with lateral, subapical crease. 

 Palpus small, slender and cylindrical with coarse hairs 

 and 1 or 2 bristly hairs at the apex. Antenna attached 

 at the upper third of the head ; the first segment is IVz 

 times as long as the second segment, the second is nar- 

 rowed at the base, twice as long as wide. The tliird seg- 

 ment is long, slender and attenuate and almost as long 

 as the combined length of the first two segments. It 

 bears a short style, barely longer than the third seg- 

 ment. First and second segments with long, strongly 

 appressed setae. 



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

 little less than I14 times the height of the head. The 

 face is narrow beneath the antenna and about a tenth 

 the head width and strongly widened below. Its sur- 

 face is very appressed pubescent or pollinose, without 

 pile on the upper half and with a small triangular 

 patch of mostly yellowish bristles in the middle of the 

 lower face and with more narrow bristles continued 

 down the sides of the subepistoma. Front distinctly 

 but slightly widened, the vertex narrowed. The ver- 

 tex is only moderately excavated ; its sides are vertical 

 and the sides of the small ocellar tubercle are also 

 nearly vertical. The ocellar tubercle is set anteriorly 

 forward but not visible in profile; it bears a pair of 

 small, stout, anteriorly curved bristles behind the 

 ocelli. 



Thorax : The thorax is comparatively short and high, 

 the mesonotiun convex anteriorly and posteriorly, 

 nearly bare but with a few anterolateral, scattered 

 setae. There is a well differentiated, double, acrostical 

 row of setae and there are quite short, dorsocentral 

 bristles near the suture and behind the suture 4 ex- 

 ceptionally long, stout bristles. Lateral bristles also 

 unusiially stout and tuberculate. There are 2 noto- 

 pleural bristles, 1 supraalar, 2 others to the rear, and 2 

 on the postalar callosity. ScuteUum with 1 pair on the 

 rim. The moderately thick, convex scutellum has a 

 deeply impressed rim and the lateral metanotal callos- 

 ity bears distinctly stout bristles together with more 

 slender elements. Upper mesopleuron and ptero- 

 pleuron with a few, fine hairs. Metapleuron with 3 or 

 4 bristles and other bristly hairs. Pronotiun with weak 

 bristles. Hypopleuron with 2 stout, long bristles. 



