198 TlHiE E'^^fTOMoLOGIST. 



dorsal transverse black bands across the distal half, both apparently 

 encircling its respective segment ; also at least a black spot on each of 

 the proximal segments, one on each side. Proximal and distal 

 joints of the antennal club dusky. Otherwise, body practically im- 

 maculate. 



Fore wings with about sixteen lines of discal ciHa across their 

 widest portion, the ciliation mostly in regular lines ; the wing com- 

 paratively small and narrow, yet pyriform in shape, the blade regu- 

 larly rounded distad, and with the marginal cilia moderately long, 

 somewhat over a third the greatest wing width. Posterior wings 

 with a paired distinct line of discal cilia along the cephalic wing 

 margin, and a third line farther caudad, which is faint, and with its 

 cilia separated more from one another in the line. Longest marginal 

 cilia of posterior wing (caudal margin) slightly shorter than the 

 longest cilia of the margins of the fore wing. Parapsidal furrows 

 complete ; abdomen conic-ovate, about as long as the head and thorax 

 united, sessile, the ovipositor projecting slightly from its tip. Tarsal 4 

 claws all moderate in length ; tibial spurs single, straight, moderately 

 short, absent on cephalic tibias ; strigils absent. (From one speci- 

 men, f-inch objective, 1-inch optic, Bausch and Lomb.) 



Male. — Unknown. 



Described from a single female specimen in balsam, received 

 from Dr. L. 0. Howard, and labelled: " Parasite on Diplosis ? in 

 stems of Ambrosia artemisiafolia. Issued May 21, '97." Pro- 

 bably from Jassid eggs in A. artemisiafolia, Linn. 



Habitat. — United States (locality unknown). 



Type.— Type, No. 13,793, United States National Museum, 

 Washington, D.C. ; a female in balsam. 



Genus Ufens, Girault. 

 1. Ufens hum, sp. n. (normal position). 



Female. — Length, 0-60 mm. Exactly similar in general structure, 

 appearance, and colour to the type species — niger (Ashmead) — but 

 differing as follows : In the fore wings primarily : they have distinctly 

 shorter marginal cilia, short in the type species, but here very short 

 and close, hardly distinguishable from the edges of the wing ; the 

 discal ciliation is different, not so dense, the straight, distinct lines 

 more numerous, consequently not peculiarly distinct as in niger ; 

 also the fore wing is fumated farther distad, and more distinctly, 

 though not pronouncedly. In the legs : the posterior femora are 

 more enlarged, ovate, and with a longitudinal lamellate sculpture. 

 The posterior wings differ in being less pointed at tip, there the 

 caudal margin bevelled off, curving convexly up to the tip of the 

 straight cephalic margin ; at this curve the marginal cilia abruptly 

 shorten. Otherwise as in the type species, to which evidently it is 

 closely allied. (From one specimen, -|-inch objective, 1-inch optic, 

 Bausch and Lomb.) 



Male. — Unknown. 



