266 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



fraterna, "feeding either upon the caterpillar stored up in the nest, or 

 upon the young larvse themselves" (see Glover, Manuscript Notes 

 from my Journal, etc., Diptera, p. 81, sub voce Eumenes). As far as I 

 remember the specimen of ToxopJiora, which Mr. Glover kindly showed 

 me many years ago, it was the species described below as T. ampMtea. 

 The species described below may be tabulated as follows : 



Second vein with a fork at the end, the posterior branch of which is con- 

 nected by a cross- vein with the third vein : 

 The cross-vein between the discal and second posterior cells is S- 



shaped, and bears no stump of a vein 1. virgata n. sp. 



The cross- vein between the discal and second posterior cells is an- 



-, ,1 1 , r. • ) 2. amphitea Walk, 



gular, and bears a long stump of a vein J 3^ ^_ ^^^ .^^^^^^^ ^(.^^j.^^^^ 



Third vein with a fork at the end ; no cross-vein between the second 

 and third veins 4. fiilva Gray. 



T. amphitea and virgata have nearly the same venation ; in both, 

 it is the second vein, instead of the third, which is furcate ; the posterior 

 branch of the fork is connected by a perpendicular cross- vein with the 

 third vein. This description applies, of course, to the venation as it 

 appears to the eye; theoretically, it is the third vein, as usual, which is 

 forked, the anterior fork being knee-shaped, and forming a square at the 

 base, the anterior corner of which is connected by a recurrent cross-vein 

 with the second vein, and thus produces the appearance of that vein 

 being forked. 



1. ToxoPHORA YIRGATA n. sp., <? $ . — Male. — Head and antennae black, 

 second joint with a white reflexion on the inner side ; a tuft of white 

 scales each side on the frontal triangle; occiput densely beset with 

 pale yellow erect pile. The bluishblack ground-color of the thorax is 

 more or less covered anteriorly withafulvoustomentura and pale yellow 

 I)ile; thepleurge are covered with white, silvery scales ; thoracic bristles 

 black. Abdomen black ; a stripe of ocher-yellow scales begins at the 

 scutellum and reaches the end of the abdomen, being gradually atten- 

 uated : the sides of the abdomen bear, on each segment, a large black 

 spot, framed in by a ring of scales, which is yellowish on the dorsal side, 

 more whitish toward the venter these rings being in close contact, 

 their yellowish scales form, in well-preserved specimens, a longitudinal 

 stripe parallel to the median dorsal stripe, and emitting, on the hind 

 margins of the segments, branches of whitish scales, running toward 

 the venter, which is another way of describing the same thing) ; venter 

 densely clothed with white scales. Legs black; femora almost entirely, 

 tibiae partly clothed with white scales. Halteres with a yellow knob ; 

 wings grayish or brownish, more or less tinged with yellowish in the 

 costal, the first basal, and the inner end of the marginal cells ; a some- 

 what more saturate, almost brownish, spot on the preefarca; the cross- 

 vein between the second posterior and discal cells is S-shaped, not an- 

 gular, without stump of a vein (a vestige of one on one of the wings). 



