124 THOMAS SAY FOUNDATION 



istic in shape': in profile the free part has a marked 

 bend forward just before its middle, from which it is 

 straight to the apex with the front and hind edges 

 parallel ; at the extreme tip it is rounded, with a tooth 

 placed just behind the middle. Accessory plate tri- 

 angular, yellow; posterior clasper stout, brown, flat 

 at tip, not much hooked ; anterior clasper the same but 

 longer, with an expanded margin near middle on 

 outer side. Penis with large basal segment, whitish 

 except on the back; distal segment beginning behind 

 with a sharp keel, shining black, which widens to a 

 flat, shining surface and narrows again to a keel, 

 which turns sharply forward in the shape of an apical 

 hook ; from each side of the keel first mentioned there 

 proceeds a flat, dark process forward and outward, 

 ending near the apical hook and, with pale margins, 

 enclosing the inner organs in a globose compartment. 

 Fifth sternite yellowish, rather widely excised at base, 

 the edges bordered with erect small black bristles. 



Legs black; median femur with close rows of 

 slanting spines below near tip, the posterior could al- 

 most be called a comb ; middle tibia with two bristles 

 on outer side ; hind tfl^ia not really villous, but with a 

 few small erect hairs approaching what is herein de- 

 fined as villosity; they are, however, not quite so long 

 as the diameter of the tibia. 



Wings nearly hyaline ; no costal spine ; third cos- 

 tal segment about equal to the fifth; first vein bare, 

 third hairy two-thirds of the way to the crossvein. 



Length 7I/12 to 8V2 mm. 



Seven miles: two Trenton, N. J. (Harbeck) ; 

 two with puparia but no rearing data, Philadelphia, 

 April 19 and 21, 1891 {Hough ColL) ; one Iloxbor- 

 ough. Pa. (Harbeck); one Columbus, O. (Hine) ; 

 one Philadelphia (C. W. Johnson). 



This may be only a variety of sima, with which 

 it has certainly a very close relation ; the forceps have 

 a different shape, and the penis seems larger and its 

 parts better differentiated in these specimens than is 

 the case with what I have called sima. 



