PROC. ENT. SOC. WASH., VOL. 43, NO. 8, NOV., 1941 183 



Femoral and tibial pile dark. Wings: rather heavily tinged throughout with 

 brown, the stigmal cell quite dark brown, the allulae linear. 



Female. Similar to the male; the front has a continuous, diffuse, slender 

 brownish stripe, the dark pubescence is less in evidence upon the scutellum, and 

 the abdominal pattern is very similar. 



Holotype: one male, Sao Paulo, Osasco, April 6-8, 1939, 

 J. Lane, collector. Allotype: one female, same data. 



A REMARKABLE NEW SPECIES OF THE GENUS PSEUD ACTEON 



(DIPTERA : PHORIDAE). 



By Charles T. Greene, 

 Bureau of Entomology and Plant Quarantine^ U. S. Department of Agriculture. 



In three genera of the dipterous family Phoridae, Apoce- 

 phalus Coquillett, Melaloncha Brues, and Pseudacteon Coquillett, 

 all of which are known to occur only in the Western Hemisphere, 

 the female has a large, exserted, horny ovipositor. In the new 

 species described below the ovipositor is exceptionally large, 

 being relatively much broader and deeper than in any of the 

 described species of the three genera. 



Pseudacteon grandis, new species. 



Female. — Length 1.75 mm. Dark brown. Front about as broad as long, gray 

 dusted, with a shining black, central, vertical stripe which bifurcates and 

 extends narrowly around the ocellar triangle; 4 transverse rows of frontal 

 bristles; first, third, and fourth rows with 4 each; second row with 2, 1 bristle on 

 each outer side; on each side of the front between the first and third rows of 

 frontals 2 vertical rows of very minute hairs, 3 in each row; postantennal pair 

 converging, proclinate. Third antennal segment oval, dark brown, with a nar- 

 row ochraceous area along the base and with pale microscopic pubescence; arista 

 one and one-half times as long as third antennal segment, microscopically pubes- 

 cent. Palpi pale yellow, each with 4 black spines apically; proboscis pale 

 luteous. 



Thorax much broader anteriorly, faintly dusted; scutellum with 4 bristles, 

 anterior pair much the smaller; halteres yellowish white; legs pale yellow with 

 brown infuscation on the apical third of hind femur. Wing with third vein 

 simple, ending before middle; second costal area twice as long as third; costal 

 fringe short, only slightly longer than thickness of costal vein. 



Abdomen dull brown with last 2 segments edged posteriorly with white and 

 with several bristly hairs on each side. Ovipositor (fig. 1) very broad, shining 

 black, horseshoe shaped, bilobed, with a central process which has 4 bristles 

 apically; across basal portion of arch a transparent colorless membrane, and 

 along the edge a row of 10 small hairs; above this row 2 vertical rows of 4 fine 

 hairs each. 



Described from two females. 



