NO. 2178. THE GENUS BRACON FABRWIVS— MORRISON. 315 



vein, at the junction of the first transverse cubital vein with the cubi- 

 tal vein, and at the lower end of the second transverse cubital vein. 

 The whole surface of the wing is sparsely clothed with short, rather 

 stout hairs, while there is a marginal fringe of stout hairs along the 

 costal vein and the stigma. The terminal section of the cubital vein, 

 the subdiscoidial vein (nervus parallelus of Szephgeti), and nearly all 

 of the median vein are lighter in color than the rest of the veins and 

 also appear to be much less developed. The hind wings are similar 

 to the forcwings in coloration and extent of hairiness. 



I have not been able to determine with entire satisfaction the 

 homologies of the venation according to the Comstock-Needham 

 system, so I have used the older terms for the various veins and cells. 

 The drawing of the wings will serve to show the arrangement of the 

 venation, which seems to be quite constant for the genus. The first 

 cubital and first discoidial cells are always united, although the base 

 of the cubital vein is more or less developed; the areolet or second 

 cubital cell is always four sided, and often approaches a parallelogram 

 in shape, although usually the fu'st transverse cubitus is more diagonal 

 than the second. 



Legs.— ^The legs are elongate and slender, with the hmd pair 

 distinctly but not prominently larger than the others. The coxae 

 are roughly conical in shape, and have the plainly two-segmented 

 trochanters attached to their extremities. The femora are elongate, 

 somewhat swollen for much of their length, gradually narrowed at 

 each end. The tibiae are quite slender for a short distance beyond 

 their attaclmient to the femora, and are then gradually swollen and 

 enlarged for the remainder of their length, being nearly as thick as the 

 femora at their apex. The fore tibiae appear to be without apical 

 spines, but the middle and hind tibiae nearly always have a variable 

 number of small stout spines at their apex, forming a group or cluster 

 above the outer and smaller terminal tibial spur. The middle 

 and hind tibiae have two spurs at their apex, the larger about half 

 the length of the first tarsal segment and the smaller slightly shorter. 

 These tibial spurs appear to be light colored in all of the species. 

 The fore tibiae have a single apical spur, modified with the base of 

 the first tarsal segment into an antennal comb. The first tarsal 

 segment is about as long as the next three united, and in the hind 

 tarsi is almost as long as all the remaining segments united. The 

 tarsal claws are large, and in all the members of this genus the first 

 two pairs are deeply and distinctly cleft, with the inner tooth flat 

 and much larger than the outer. The hind tarsal claws vary from 

 cleft to prominently toothed at the base. All of the legs are more 

 or loss hairy, the coxae and femora smooth and shining, sparsely 

 punctate and hairy, the tibiae much more closely punctured and 

 hairy and somewhat roughened by the punctures, the tarsi thickly 

 clothed with stout hairs, especially beneath. 



