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UNITED STATES NATIONAL MUSEUM BULLETIN 2 24 



dense, short, fine, curled, appressed or sometimes longer 

 and always longer and erect along the anterior margin. 

 The discal pile is undifferentiated. Humerus with long, 

 bristly pile. Lateral bristles long and stout or slender ; 

 they consist of 2 or 3 notopleural, 4 or 5 supraalar, 2 or 

 3 postalar bristles; scutellum with 4 or 5 pairs of stout 

 bristles or the whole margin with 1 or 2 rows of long, 

 slender bristles or bristly hairs. The discal pile is 

 abundant, long and bristly, appressed laterally or erect. 

 Pleuron without bristles except on the metapleuron 

 where there is a wide, vertical band of numerous, very 

 long, slender bristles, and also 1 long, stout, mesopleural 

 bristle. Propleuron, upper border of the mesopleuron, 

 upper corner of the sternopleuron and the posterior 

 hypopleuron with some bristly hair. Metanotal cal- 

 losity with stout bristles and pile. Prosternum fused 

 and continuous. Metasternum pilose; postmetacoxal 

 area with a complete arch of chitin. 



Legs : The femora are quite stout and a little swollen ; 

 the hind femur and its tibia are somewhat lengthened, 

 the tibia also stout. Pile rather long and shaggy, bristly 

 and appressed. Ventral surface of the hind femur and 

 its tibia with a dense or scattered submedial band of 

 erect pile. Bristles of the legs range from slender 

 to stout, all of them exceptionally sharp and attenuate 

 and tending to be stouter at base. The dorsoventral 

 bristles of the middle tibia are especially long. Hind 

 femur with 3 or 4 unusually stout, ventrolateral bristles 

 on the outer half and several smaller, dorsolateral 

 bristles on the outer half and less prominent, numerous, 

 dorsomedial, distal, bristly hairs; base below with 2 

 or 3 stout bristles. Middle femur with numerous, 

 slender bristles or bristly hairs dorsally, posteriorly 

 and ventrally. Anterior femur similar to the middle 

 pair. Posterior tibia with about 15 weak, dorsomedial 

 bristles, 8 or more dorsolateral bristles, 4 or 5 of which 

 are quite stout, and 2 stout ventrolateral bristles; the 

 long anterodorsal and posterodorsal bristles of the mid- 

 dle tibia contain 4 to 7 above and 3 or 4 below. In 

 general the tibial bristle rows are rather irregular, the 

 elements grading off into numerous, long, bristly hairs. 

 Claws sharp, pulvilli and empodium well developed. 



Wings : The wings are broad and tinged with brown ; 

 the stalk of the marginal cell is long; the posterior 

 branch of the third vein ends far behind the wing apex. 

 The stalks of the fourth posterior and anal cells are 

 long; end vein of discal and fourth posterior cells 

 aligned in the same plane. Alula short ; ambient vein 

 complete. 



Abdomen: The abdomen is robust, shining, without 

 punctures except sometimes on the middle of the basal 

 segments. The abdomen is unusually convex, the sides 

 nearly parallel, or the apex slightly wider. Pile of 

 the abdomen matted and appressed on the first two ter- 

 gites, dense and erect on the sides of the remaining 

 tergites or flat appressed throughout the whole ab- 

 domen. All tergites with 2 or more very stout, lateral 

 bristles. Males with seven tergites, the seventh promi- 

 nent and large. Females with seven tergites, the 



seventh large, the eighth completely concealed, the 

 ninth with a medial, discal cleft and mostly concealed, 

 or sometimes entirely recessed beneath the seventh ter- 

 gite. Male terminalia large and short but not concealed, 

 rotate one-half. The epandrium has a wide, circular 

 excision. 



Distribution: Australian: Cyanonedys harnii Her- 

 mann (1912) [ = albohirta Eicardo (1912)]; leucura 

 Hermann (1912) [=nigrescens ~Rica.rdo (1912)] ; lugu- 

 bris Hermann (1912*) [ = aurif 'acies Eicardo (1912)]. 



Paratractia, new genus 



Figures 228, 281, 639, 1280, 1289 



Type of genus : Laphria dasyjnis Wiedemann, 1828. 



Exceptionally broad, robust flies, the abdomen is 

 considerably wider than the thorax. They are densely, 

 minutely punctulate, with short, appressed pile. Ter- 

 gites with 2 or 3 pairs of stout bristles laterally; the 

 wings have the end vein at the discal and fourth pos- 

 terior cells in exact alignment. The face is rather wide ; 

 the elongate third antennal segment bears a dorsal, 

 spinous notch in the middle. Eelated to Atomosia 

 Macquart, they are rather readily separated by the 

 swollen hind femur, the swollen and arcuate hind tibia, 

 both of which bear dense, bristly pile on dorsal and 

 ventral surfaces. Hind basitarsus similarly swollen and 

 pilose. In addition the chitinous bridge of the post- 

 metacoxal area, while complete is exceptionally short 

 or narrow. Length 8 mm. 



Head, lateral aspect: The face is plane in profile 

 and the upper part is quite short; it is moderately 

 produced or elevated below at the epistoma and the 

 epistomal margin is gently convex. The subepistomal 

 area is long, plane and only moderately oblique. The 

 occiput is short, visible throughout the length of the 

 head but tapered to an end almost at the extreme 

 vertex; the eye is gradually and leather narrowly re- 

 cessive on the lower portion but plane throughout most 

 of its length. Pile of occiput dense, exceptionally fine 

 and rather long on the ventral half, it continues fine 

 though shorter and more scanty, at least up to the 

 upper third of the head; the bristles are quite short, 

 not or scarcely extending above the eye and all slender 

 and pale. The proboscis is rather slender, directed 

 obliquely forward and downward ; the apex is bluntly 

 pointed above and below with stiff pile which curls 

 outward or forward. There is a quite high, conspicu- 

 ous, dorsal ridge which begins to be prominent sub- 

 basally, rises, and then tapers gradually down to near 

 the apex. The basal half of the proboscis below gently 

 swollen and also swollen a little laterally so that only 

 the apical half is nearly subcylindrical. The basal pile 

 is mostly lateral and consists of long, bristly hairs. 

 The proboscis, if directed forward, would barely, per- 

 haps not at all extend beyond the face., Palpus clearly 

 of two segments, the first segment rather robust, convex 

 below and excavated, with 7 or 8 long, fine bristty hairs, 

 and free both medially as well as laterally; second seg- 





