PROC. ENT. SOC. WASH., VOL. 23, NO. 5, MAY, 1921 12.^ 



REICHERTELLA Enderlein. 



A. Femora swollen; antennae shorter than head- femora/is. 



AA. Femora slender; antennae as long as head .. .gracilis n. sp. 



Reichertella femoralis Meigen. 

 Virginia near Plummers Id., Md., May 20, 1914, R. C. 



Shannon. 



Reichertella gracilis, n. sp. 



First section of costa : second :: 2 : 1; subcostal cell broad; apical cell much 

 longer than its stalk. Body black, mostly shining; legs somewhat brownish; 

 slender, hind tibiae expanded apically. Length 1.8 mm.; antenna .34 mm. 



Type, a female, Washington, D. C., May 24, 1916, A. Busck 

 (U. S. N. M.). 



RHEGMOCLEMA Enderlein. 

 A. Second vein joining costa at from one-half to two-thirds distance between 



wing-root and end of third vein. 

 B. Length 1.3-2 mm., color normally deep black; last male tergite 



tapered into a long process which is not expanded apically atrata. 

 BB. Length 1.1-1.3 mm., color in part or wholly brown; last male tergite 



tapering into a long process which is spatulate apically- barrus n. sp. 

 AA. Second vein extending farther distally; second section of costa only 

 about one-fourth length of first. 



C. Apical cell about the same length as its stalk... .floralis n. sp. 



CC. Apical cell much longer than its stalk... ...willistoni n. n. 



Rhegmoclema atrata Say. 



Fairly common; Virginia near Plummers Id., Md., Nov. 2, 

 to 15, bred from butternut (Julians cinerea) hulls collected 

 Oct. 10, 1914; Plummers Id., Md., Aug. 8, 1914,^ bred from 

 fungus; Md., near Plummers Id., May 5, 1915, R. C. Shannon; 

 Maywood, Va., April 21, May 26, 1916; Washington, D. C., 

 Tune 4, 29, 1912, on windows, McAtee; May 21, 1915, H. S. 

 Barber; June 7, 11, 1915, F. Knab; Woodridge, D. C., April 25, 

 1914, L. O. Jackson. Specimens are at hand also from Salmo, 

 Wis., Aug. 11, 1919, McAtee. 



Rhegmoclema barrus. n. sp. 



First section of costa -.second ::5 : 3; apical cell more than three times as long 

 as its stalk; last vein trisinuate, only the median bend very strong. Head and 

 body blackish (sometimes brown), pleura, and legs brownish. Last male 

 tergite shining pale brownish, cream colored at base, tapered apically into a 

 long process which is more or less expanded apically. Length 1.1-1.3 mm.; 

 antennae about .25 mm. 



Type, a male, Washington, D. C., January 15, 1915, R. C. 

 Shannon. Several paratypes with same data. (U. S. \. M.) 



Rhegmoclema floralis, n. sp. 



First section of costa : second :: 13 : 3; apical cell almost exactly as lung as its 

 stalk; last vein bisinuate. Black, thorax somewhat shining, abdomen rather 



