Vol. XI] CURRAN— REVISION OF THE PIPIZA GROUP 351 



5. Pipizella australis (Johnson) 



Pipiza pulchella Johnson, Proc. Acad. Nat. Sci. Phila. , 

 XLVII, p. 329, 1895 (Not of Williston.) 



Pipiza australis Johnson, Psyche, XIV, p. 77, 1907. 

 Habitat: Florida (Johns.) 



"Head thorax and abdomen black, or very dark blue-black, shining, 

 covered with a sparse, whitish pile. Antennas brown black, length of third 

 joint between four and five times its width, under side towards the base more or 

 less reddish. Legs bluish black; tips of all the femora, basal half of the front 

 and middle tibia?, the basitarsi and two following joints of the tarsi, yellow; 

 basal half of the posterior basitarsi and the last two joints of all the tarsi, 

 black. Wings brown, somewhat lighter towards the base; last section of fourth 

 longitudinal vein angulated in the middle. Length, 6 mm." 



"It is distinguished from P. pulchella by its longer third antennal joint, 

 dark brown wings and very dark blue black body." (Johnson.) 



6. Pipizella rufithoracica, new species 



Habitat: California! Antennae black; eyes with hori- 

 zontal bare stripe almost obsolete; pile on disc of thorax 

 reddish; on abdomen black and reddish or luteous; hind 

 tarsi black. 



Male: Length, 6.5 mm. Pile of the head entirely black, moderately long 

 and stiff on face; face and frons shining black, the sides narrowly gray pollin- 

 ose; face slightly receding, gently rounded above middle, straight below. 

 Antennae black, third joint two-and-one-half times longer than wide; arista 

 black, bare. Eyes with moderately short black pile. Thorax obscurely cu- 

 preous; pile fairly short, reddish, everywhere intermixed with stout, longer, 

 black hairs, which are rather sparsely placed; front of dorsum, sides, and the 

 pleura? with black pile, except below the wings where it is reddish; scutellum 

 with its apex compressed, its pile as on dorsum of thorax. Abdomen slender, 

 scarcely wider than thorax, shining greenish black, the usual areas sub-opaque; 

 pile short, black; basal angles and posterior sides of fourth segment with con- 

 spicuous reddish pile; shining portions of segments two and three also with 

 reddish pile which does not reach the margins; on these segments the pile only 

 shows red in some lights. Legs black, black and reddish pilose; tips of four 

 anterior femora, bases of their tibia?, and tips of middle ones, yellowish; 

 narrow base of hind tibia? luteous; middle basitarsi luteous; front basitarsi with 

 red pubescence below; hind basitarsi not at all swollen. Wings tinged with 

 blackish, especially just before middle; stigma luteous; last section of fourth 

 vein bent at its middle, curving moderately outwards, then joining third vein 

 at almost a right angle. 



Female: Length, 5 to 6 mm. Arista yellow basally; face, except upper 

 angles, and front broadly across middle, with yellow pile; a few yellow hairs 

 over ocellar triangle. Sometimes face everywhere bordered with black pile, 

 leaving only middle yellow pilose. Pile of thorax entirely reddish yellow, very 

 short; scutellum with pile similar to that of thorax, its margin as in male. 

 Abdomen broader than the thorax, its pile very similar to that of male, but 

 light pile more yellowish and much more extended, in some specimens covering 

 all but the moderately broad anterior and posterior margins and a median 

 line on second segment. Legs and wings as in the male but the discal cell 

 slightly shorter. Sides of face whitish pollinose, this stripe widely separated 

 from minute spots on frontal orbits. 



