SEKPHOID AND CHALCIDOID PAKASITES OF THE HESSIAN ELY 43 

 DESCRIPTION 



The female of Eupehnus allyrdi is similar in general appearance 

 to Eupelmus atro purpureas Dalman but is at once distinguishable 

 by the ovipositor, which extends only slightly beyond the apex of 

 abdomen, and by the wings, which are always fully developed. The 

 male is easily recognized by the striking color of its legs, all the 

 femora being pale yellow, the middle and hind tibiae being black 

 except narrowly at apex and the anterior pair usually more or less 

 blackish. May be separated from Eupelmella vesicwlaris (Retzius) 

 by the less strongly exsertecl ovipositor and the fully developed wings, 

 as well as by the different conformation of the mesonotum. This 

 species differs from Calosota metallica Gahan by the much narrower 

 base of the scutellum and the greater concavity of the mesonotum, as 

 well as by the less metallic color and differences in sculpture. From 

 other parasites of the fly it may be distinguished by its long, slender 

 body, as well as by numerous other structural characters. 



Female. — Length 1.5 to 3.4 mm. Head as broad as or a little broader than 

 thorax, about twice as broad as thick antero-posteriorly at the middle, very 

 slightly concave behind ; ocelli in a nearly, equilateral triangle, postocellar line 

 distinctly longer than ocellocular line, the latter about equal to diameter 

 of an ocellus, vertex not broad ; eyes large, rather prominent, elliptical, with 

 very short inconspicuous pile; temples about one fourth as broad as the eyes; 

 viewed from in front, the head subtriangular, narrowing below,, a little broader 

 than high, the malar space longer than half the eye height ; malar groove com- 

 plete ; clypeus not distinctly separated from face, its anterior margin nearly 

 straight; mandibles each with three teeth, the two outer teeth subacute, the 

 inner one rounded and with its margin very weakly serrated ; maxillary palpi 

 4-jointed, short, the first three joints subequal, the apical joint nearly as long 

 as the other three combined ; labial palpi 3-jointed ; scrobes deep, subtrian- 

 gular, the antennal fossae separated by a short, rounded, triangular plate. 

 Antennae 13-jointed, long, strongly clavate; scape reaching nearly to the level 

 of front ocellus, slightly expanded, flat on the outer side, subconvex and weakly 

 reticulated on the inner side ; pedicel slightly longer than the first two flagel- 

 lar joints; first funicle joint (really the ring joint) about one half as long as 

 broad ; third and fourth subequal in length and a little longer than second ; 

 fifth a little longer than broad ; sixth subquadrate ; seventh and eighth broader 

 than long; funicle moderately slender at base but gradually increasing in 

 thickness toward apex ; club more or less obliquely truncate, distinctly thicker 

 than funicle, 3-jointed, the joints subequal in length ; each of the funicle and 

 club joints with a single series of elongate sensoria. Frons and most of vertex 

 nearly smooth ; occiput, face, cheeks, and temples, except along eye margins, 

 distinctly finely reticulated and sparsely clothed with pale hairs. Thorax about 

 twice as long as broad; prothorax forming a short conical neck; mesonotum 

 about as long as broad, very weakly sculptured and clothed with pale hairs, the 

 parapsidal grooves deeply impressed at anterior angles, and merging into a 

 more or less deep concavity down the middle of the posterior two thirds of 

 mesoscutum; scutellum small, rounded at apex, very narrow at base and 

 weakly sculptured ; axillae on nearly the same plane as scutellum and nearly 

 meeting at the middle, the sculpture like that of scutellum ; mesopleura large, 

 evenly reticulated ; propodeum very short. Wings always fully developed, fore 

 wing extending to or a little beyond the apex of abdomen, nearly three times 

 as long as broad; marginal vein nearly as long as submarginal; stigmal vein 

 about one third as long as marginal; postmarginal vein one half as long as 

 marginal; base of wing, including the costal cell, evenly ciliated like the re- 

 mainder ; marginal cilia very short ; hind wing fully three fourths as long 

 and nearly two thirds as wide as fore wing. Legs moderately long ; front tibial 

 spur long and curved, the tibia with two or three short black spines at apex 

 on outer side; middle femora flattened dorsoventrally, their tibiae thickened 

 toward apex and with a patch of short black spines at apex on the inner 

 side, their first three tarsal joints swollen and each with a double row of black 

 spines beneath, the tibial spur large and nearly as long as first tarsal joint; 



