50 Bulletin Wisconsin Natural History Society. [Vol. 8, No. 1. 



as long as the second, its median third elevated and bounded laterally 

 by two longitudinal carina? which are united across the middle of the 

 segment by a transverse carina. Second segment with a fovea on each 

 side half way to the margin ; between, and from each of the f ovese with 

 a fan-shaped series of extremely delicate aciculations which reach 

 nearly to the middle of the segment; third, fourth and fifth segments 

 equal, short ; sixth triangular, but rounded at the tip, twice as long as 

 the preceding. Legs as in Polygnotus ; yellow with the coxae black, and 

 the posterior femora and tibiae somewhat, infuscated. Wings hyaline, 

 veiiiless. 



Male. Differs from the female mainly in the form of the antennae. 

 The first flagellar joint is shorter, only about two-thirds as long as the 

 pedicel which is eqtial to the second flagellar joint. The latter is some- 

 what thickened and arcuate, stouter at the tip. The antennae are 

 entirely yellow. 



Described' from nine specimens bred by Dr. E. P. Felt from 

 Cecidomyid galls collected at Albany, New York, and Beverly, 



Massachusetts. 



FAMILY BRACONID^:. 



SUBFAMILY BLACIN7E. 

 Brachistes magdali sp. nov. 

 Female. Length 5.5 mm. Ovipositor 2. mm. Shining black, the 

 plapi, base of antennae, tegulae and legs, including the coxae, honey- 

 yellow. Head full behind the eyes, transverse, twice as wide as thick. 

 Eyes oval, bare, removed from the hind margin of the head by their 

 own width and from the base of the mandibles by one-half their width ; 

 inner margins parallel. Vertex and head behind polished, with 

 scattered delicate punctulate sculpture ; the posterior margin very 

 distinct. Ocelli in a small, nearly equilateral triangle. Antennae 33-34- 

 jointed, filiform, about as long as the body. Scape oval, pedicel globose ; 

 first flagellar joint three times as long as thick, slightly longer than 

 the scape ; second as long as the first, the following gradually growing 

 shorter until those near the apex which are but one-half longer than 

 thick. Maxillary palpi five-jointed, as long as the head-height; labials 

 three-jointed, the first joint very short. Face sparsely punctulate, 

 griseous pubescent. Clypeus strongly elevated, its anterior margin 

 almost straight. Mandibles rufous. Thorax elongate, shining. Meso- 



