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UNITED STATES NATIONAL MUSEUM BULLETIN 224 



widened, deeply excavated and densely pilose laterally ; 

 the ocellarium is moderately large with 1 or 2 pairs of 

 very stout bristles and sometimes some additional hairs. 



Thorax: The mesonotum long and low, dully or 

 strongly shining, with fine, scanty, nearly erect, bristly 

 pile and sometimes posterior bare areas, or with the 

 whole surface pilose. Pile mostly undifferentiated, 

 though often longer behind. Some species have both 

 acrostical and posterior dorsocentral elements differ- 

 entiated. Humerus with abundant, bristly pile. The 

 lateral bristles are stout and consist of 1 notopleural, 

 5 or 6 supraalar, a wide band of bristles on the postalar 

 or a row with as many as 5 elements. The scutellar 

 margin usually has a broad band of long, slender 

 bristles and bristly pile, and similar elements over the 

 disc, or with 3 or 4 pairs of long, stout bristles, a very 

 few bristly hairs and a little, short, scanty pile on the 

 disc. The mesopleuron posteriorly has 1 to several stout 

 bristles and additional, abundant, bristly pile con- 

 tinued on to the upper sternopleuron. Propleuron with 

 abundant, bristly pile, the pronotum sometimes with 

 bristles. Presternum fused and continuous. Metapleu- 

 ron with a wide band of numerous, long, slender 

 bristles. Metasternum pilose, the metanotal callosity 

 without pile or bristles, the postmetacoxal area 

 membranous. 



Legs : The femora are quite stout and a little swollen 

 distally on all pairs ; together with the tibiae they tend 

 to be densely covered with very numerous, quite long, 

 bristly hairs of all grades in thickness. Some species 

 have bristles better differentiated than others. Usually 

 there are 2 stout, lateral bristles on the hind femur on 

 the distal fourth and a tuft of 3 medially at nearly 

 the same level. Hind tibia dorsally with a double row 

 containing 7 long, slender bristles. Anterior tibia 

 likewise with a double row containing 7 or 8 bristles. 

 Claws stout and sharp, pulvilli well developed, the 

 long empodium bladelike. 



Wings: The marginal, fourth posterior and anal 

 cells all closed with a long stalk. The anterior branch 

 of the third vein ends well before the wing apex, the 

 posterior branch ends far behind. First posterior cell 

 closed with a long stalk in the type of genus, or open 

 and a little narrowed. The end vein of the fourth 

 posterior cell has moved far toward the base along the 

 lower margin of the discal cell. Alula well developed ; 

 ambient vein complete. 



Abdomen : The abdomen is generally broad and shin- 

 ing with fine, appressed, setate pile which becomes 

 longer, coarse, more or less erect and often shaggy 

 along the sides. At least the first 4 or 5 tergites have 

 1 or 2 strong bristles laterally. Males with six tergites 

 well developed, the seventh shorter but not concealed. 

 Females with seven tergites, the seventh also quite 

 short. Male terminalia rather large, rotate, the epan- 

 drium only moderately long and undivided. The 

 gonopod is prominent, the hypandrium quite small, 

 leaving the genital cavity exposed. Female terminalia 

 with the eighth tergite broad and triangular, convex 



and somewhat laterally compressed; the ninth is 

 elongate and slender and pilose apically and also 

 compressed. 



This genus has a very wide but curiously scattered 

 distribution with no concentration anywhere. Even 

 including the species of Pogonosoma Rondani, which is 

 only an Andrenosorna with three submarginal cells, 

 there is no great number of species known from any 

 part of the world. 



Bezzi (1908) suggested that Senoxericera Macquart 

 is the same as Andrenosorna Rondani and I believe that 

 he is correct. However, I have not seen the type and 

 withhold a decision in this matter. If they are 

 the same, then Senoxericera takes precedence over 

 Andrenosorna. 



Distribution: Nearctic: Andrenosorna cruenta Mc- 

 Atee (1919) ; fulvicauda Say (1823) l=pyrrhacra 

 Wiedemann (1828)]. 



Neotropical: Andrenosorna acunai Bromley (1929) ; 

 appendiculata Macquart (1846) ; camposi Curran 

 (1931); chalybea Williston (1885); cincta Bellardi 

 (1861); cinerea Bellardi (1861); erassa Bromley 

 (1929) ; erythropyga Wiedemann (1828) ; igneum 

 Bromley (1929) ; laticornis Walker (1855) ; mesoxan- 

 tha Wiedemann (1828) ; purpurascens Walker (1851) ; 

 pygophora Schiner (1868) ; quadrinmculata Bromley 

 (1929) ; rubida Williston (1901) ; rufiventris Blanch- 

 ard (1852); sarcophaga Hermann (1912); sexpunc- 

 tata Williston (1901) ; varipes Banks (1920) ; xanthoc- 

 nema Wiedemann (1828). 



Palaearctic: Andrenosorna albibarbe Meigen (1820) 

 [ = adustiventris A. Costa (1863), erythrura Loew 

 (1847)]; albopilosum Villeneuve (1911); atra Linne 

 (1758) [=violacea Meigen (1804), prostrata Scopoli 

 (1763)]; bayardi Seguy (1951); cyrtoxys Seguy 

 (1951); leucogenys Seguy (1951); pusilla Hermann 

 (1905) ; serrata Hermann (1905) ; trigoniferum Her- 

 mann (1905) ; violacea Fabricius (1781). 



Ethiopian: Andrenosorna africana Ricardo (1927) ; 

 albibarbis Macquart (1849) ; fboranica Corti (1895) ; 

 igniferum Engel and Cuthbertson (1937). 



Oriental: Andrenosorna cedrusa Ricardo (1927); 

 choprai Bromley (1935); crassipes Fabricius (1805); 

 fusifera Walker (1865). 



Australian : Andrenosorna queenslandi Ricardo 

 (1927) ; tectamm Walker (1849) ; vidua Bigot (1878). 



Perris (1871) treats the larva of Andrenosorna atra 

 in detail; Brauer (1883) considers the pupa. 



Genus Pogonosoma Rondani 



Figures 238, 622, 1244, 1253 



Pogonosoma Rondani, Dipterologiae italleae Prodromus, vol. 

 1. p. 160, 1856. Type of genus : Asilus maroccanum Fabri- 

 cius, 1704, by original designation. 



Large flies, very similar to Andrenosorna Rondani 

 but readiby distinguished by the presence of three sub- 

 marginal cells and the complete crossvein separating 

 them. Length 18 to 24 mm. 





