438 



■DNITED STATES NATIONAL MUSEUM BULLETIN 224 



long. The scutelliun is less thick and with more or less 

 impressed rim, pollinose and with numerous, long, stiff, 

 surface hairs. Base of scutellum on each side with a 

 tuft of pile, absent in Ommatius; there is also present 

 a tuft of pile immediately below the halteral base, ab- 

 sent in Ommatius. Pleuron similar to Ommatixis ; the 

 posterior basalare bears 1 or 2 stout bristles and other 

 stiff bristly pile. The postmetacoxal area has a com- 

 plete chitinized arch. Prosternum dissociated. 



Legs : The legs are similar to those of Omtnatius in 

 the vestiture and the number of bristle elements in the 

 bristle rows. The bristles however, are remarkably 

 stout, blunt, almost spikelike; the hind femur has 6 

 dorsolateral, 6 dorsomedial, 1 pair of bristles dorsally 

 at the subapex, 7 ventrolateral and 7 ventromedial 

 bristles. Tibial bristles of more reduced quantity. 

 Claws and pulvilli similar to Ommatius. 



"Wings: The wings differ in 2 features from those of 

 OmTnatius; the posterior branch of the third vein ends 

 almost at the wing apex and both the first and second 

 posterior cells are wide at the margin. The second pos- 

 terior cell is strongly widened at the base and twice as 

 wide as the end of the discal cell. The lower end vein of 

 the discal cell is nearly 4 times as long as the oblique, 

 posterior crossvein. 



Abdomen: The abdomen is stout, especially at the 

 base, which is nearly as wide as the mesonotum; it is 

 distinctly though gently tapered ; the pile is short and 

 appressed setate. The sides of the first tergite bear 7 

 stout bristles. Males with eight well developed tergites ; 

 the eighth laterally is at least two-thirds as long as the 

 seventh, but medially it has a crescentic excision, which 

 is filled out by membrane. Male terminalia large, broad 

 and clublike. The superior forceps with a distilateral, 

 flattened, winglike process curved slightly toward the 

 middle and bearing a long, slender, ventral, sigmoid, 

 apically hooked process. Gonopod is as long as the 

 superior forceps ; the hypandrium has a long, flattened, 

 medial process, which bears a terminal brush of long 

 pile. Female terminalia consist of a flat, quadrangular 

 plate with medial crease ; beside it, and extending a little 

 beyond there is a posterolateral corner extension of the 

 eighth stemite, which consists of a sharply bladed, 

 sharply pointed, vertical, knifelike process. Behind 

 this process there are 3 or 4 stout, long, spikelike bristles. 



I am indebted to Mr. Oldroyd for calling to my at- 

 tention the feature of the unique terminalia. Malloch 

 (1928) noted the tuft of stiff haire above the base of the 

 humeri. 



Distribution: Oriental: Cophinopoda chineTisis Fa- 

 bricius (1794) [=an</rocZes Walker (1849), conse/inens 

 Wulp (1872), coryphe Walker (1849), -flavescens Fa- 

 bricius (1805), fulvidus Wiedemann (1821), fulvus 

 Doleschall {\%5l),garnotiiG\iiv\n. {18S0) , inextricatus 

 Walker {18Q2) , pennus Walker (1849)]. 



I have seen an undescribed species from Madagascar, 

 which belongs here and is quite separable from in- 

 dividuals of Cophinopoda chinensis taken in eastern 



Asia ; however, it is possible that one of the names now 

 in synonymy under Cophinopoda chinensis may apply 

 to it. The genus has, under this name, been recorded 

 from Sokotra. 



Genu8 Michotamia Macquart 

 FiGUBES 305, 692, 1364, 1373, 2280, 2336, 2350 



Michotamia Macquart, Diptferes exotiques, vol. 1, pt. 2, p. 72, 



1838. Type of genus: Michotamia analis Macquart, 1838, 



by nionotypy. 

 AUocotosia Sehiner, Verb, zool.-bot. Ges. Wien, vol. 16, p. 845, 



1866. Type of genus : Asilus aurata Fabriclus, 1794, by 



original designation. 

 AUocotasia Wulp, Tljdschr. Ent., ser. 2, vol. 7, p. 249, 1872, 



lapsus. 



Flies of mediiun size, characterized by the slender, 

 tapered abdomen, the extremely scanty, short pile of 

 the poUinose mesonotum and pleuron, and the prom- 

 inent bristles of the face. It is at once distinguished by 

 the tuft of long, ventral and apical hairs borne on the 

 antennal style. The long, attenuate third antennal seg- 

 ment, short style and apical tuft of chiefly ventral hairs 

 separate the genus from Ommatius Wiedemann. 

 Length 15 to 20 mm. 



Head, lateral aspect: The head of medium length, 

 the face plane with the eye margin on the upper part, 

 becoming moderately extended below but never con- 

 spicuous. The face profile is either plane or barely con- 

 vex. Cheeks moderately extended below the eye. The 

 occiput is only moderate in extent, receding for some 

 distance away from the eye margin, the lower half bears 

 rather dense, somewhat matted pile from coarse to fine 

 in character. The upper half has bristles which begin 

 at the middle of the head and on the upper fourth con- 

 sist of a row of 9 quit© stout, pale or black bristles. 

 Proboscis directed obliquely downward and only mod- 

 erately long ; the apical fourth is reduced in width and 

 the proboscis is somewhat tapered, beginning at the 

 basal third. Apex bluntly rounded, with minute hairs 

 dorsally at tlie apex and between the two halves. On 

 the palpus there appears to be a distinct, short, exca- 

 vated, ventrally pilose, distally constricted remnant of 

 the basal segment. The ultimate segment is long, 

 cylindrical, moderately stout with unusually dense, 

 rather fine pile on all sides and several long, stout 

 bristles at the apex. The antenna is attached at the 

 upper fourth of the head; the first two segments are 

 quite short, each about as long as wide or barely longer. 

 The third segment is long and at the base as wide as the 

 second segment and gradually tapered from base to 

 apex; the apex becomes quite narrow. This segment 

 may be nearly three times the combined length of the 

 first two; it bears a short style with 10 to 12 ventral 

 plumes or hairs in two rows or somethnes an apical tuft 

 of hairs. "Wliole antenna about as long as head. First 

 two segments with numerous setae above and below. 



