168 Proceedings of the Biological Society of Washington. 



rest of the abdomen, second tergite with a dark tinge, its spiracles about 

 two-thirds the length of the segment from the base and removed from the 

 lateral edge by about three spiracle widths, lunulae nearer the spiracle 

 than to the base of the segment and distinctly longer than wide; exserted 

 portion of ovipositor hardly as long as the apical truncature of the 

 abdomen. 



AUotopotype, October 3 : Very similar to the type. Eyes not distinctly 

 converging below; length 9 mm. ; vervellus angulated close to the lower 

 end, hind tibiae and tarsi mostly infuscated. A paratopotype male was 

 collected June 25; female paratypes examined are from Falls Church, 

 Va., May 10, Bluemont, Va., July 22, Black Mt., N. C, North Fork 

 Swannanoa, May; male paratypes examined are from Plummers Id., 

 Md., August 29, and Falls Church, Va., .September 7. 



The above material is all from the collection of Nathan Banks. There 

 are three female paratypes in the collection of the Biological Survey from 

 Plummers Island, Md., August 4, 1907, September 23, 1906 (A. K. Fisher), 

 and Great Falls, Va., May 10, 1915 (L. O. Jackson). 



Cymodusa distincta (Cresson). 



Mesoleptus distinctus Cresson. 

 Limneria distincta Cresson. 



Male. — Collection Nathan Banks. From Great Falls, Virginia, June 

 21. Length 8 mm. ; antennae entirely blackish ; eyes only a little nearer 

 to each other below than above, fourth and fifth tergites entirely reddish, 

 sixth and seventh blackish above, reddish laterally. In other particulars 

 it agrees with the original description. Areola separated from the petio- 

 larea by a distinct carina as in the female. 



Cymodusa simplicicornis new species. 



Type. — Collection of Nathan Banks. Collected at Falls Church, Vir- 

 ginia, May 26. 



Related to C. distincta (Cresson) from which it differs especially in its 

 entirely black flagel. 



Female. — Length 5.5 mm. ; black, covered with silvery pubescence, 

 ocellocular line distinctly shorter than the postocellar line, the latter a 

 little shorter than the ocelloccipital line, shortest distance between the 

 eyes two-thirds as long as the distance between the eyes on a horizontal 

 line drawn tangent to the anterior ocellus, clypeocular line apparently 

 half as long as the mandibles are wide at base, head finely sculptured and 

 shining, antennae 27 or 28-jointed, ratio of length of first joint of flagel to 

 the combined length of next two as 7 is to 9, scape yellowish beneath, man- 

 dibles yellow with castaneous tips, palpi yellowish white; thorax finely 

 sculptured and shining, the notauli represented by rugulose areas that unite 

 back of the middle of the dorsulum in a rugulose area occupying most of 

 the middle third of the posterior half of the dorsulum, mesopleurae 

 punctured and shining, the posterior half divided transversely by a shallow 

 impression above which the tegument is impunctate, tegulae, wing base, 



