NATURAL SCIENCES OF PHILADELPHIA. 403 



across vertex, inclosing ocelli, posterior margin of occiput, sutures 

 of thorax above and beneath, three broad lines on raesothorax, tip 

 of scutellum, an elongate conical spot on middle of motatliorax, 

 sides of posterior coxae, the femora beliind, base of first segment 

 of abdomen, and the remaining segments except apical submar- 

 gins, brown or brown-black, extreme apical margins of the seg- 

 ments black; antennae also brown with a broad, indistinctly defined 

 testaceous annulus before the middle, the scape yellow beneath; 

 wings hyaline, fiiintly yellowish, iridescent, nervures and stigma 

 orange-yellow. Eyes large, face small, base of clypeus arcuate, 

 its tip emarginate ; antennae rather stout, rather more than half 

 the length of the body, basal joints of flagellum short and sub- 

 equal ; mesothorax prominently trilobed, the central lobe grooved 

 down the middle, metathorax rounded, sloping to the base; 

 smooth and shining, with long, blackish pubescence on the sides ; 

 legs subrobust ; areolet of anterior wings subrhomboidal, more 

 longitudinal than usual in Pimpla; abdomen subpetiolate, the first 

 segment nearly as long as tlie two following, and much narrower, 

 parallel on the sides, with two elevated longitudinal lines, strongly 

 divergent at base ; second segment about as wide at base as the 

 apex of the first segment, gradually dilated posteriorly, remaining 

 segments strongly transverse ; second and following segments 

 densely sculptured, contracted at base and clothed with a black 

 pubescence, which is longer on the sides. Length 4-5^ lines. 



Orizaba. (Sumichrast, No. 81.) Much like zapofeca in orna- 

 mentation, but very different in form. 



14. Pimpla ichneumoniformis, n. sp. 



%. Black, thinl}"^ pubescent; antennae flavo-testaceons, dusky 

 at tips ; tegulae, spot beneath, obscure stains on sides of metatho- 

 rax, four anterior legs in front, tips of posterior femora obscurely', 

 obscure stains on sides of first three abdominal segments, and 

 narrow apical margins of all the segments, more or less obsolete, 

 obscure honey -yellow; wings hyaline, tinged with yellow, espe- 

 cially along the costa, nervures and stigma honey-yellow ; thorax 

 opaque, tip of abdomen shining. Form elongate, slender; head 

 transversely compressed, eyes large, clypeus concave ; antennae 

 two-thirds as long as body, slender, filiform, joints distinct, the 

 third not quite as long as fourth and fifth togetiier; mesothorax 

 convex, finely shagreened; scutellum subconvex; metathorax 

 rounded, transversely striated, the extreme tip smooth and shin- 



