1865.] 249 



Genus AULACUS, Jurine. 

 Aulacus rufitarsis, Cresson. 



Aulacus rufitarsis, Cresson, Proc. Ent. Soc. Philad. iii, p. 134. 



Six 9 specimens. 



Fam. ICHNEUMONTDJE. 



SuMuil. ICHNEIIMONIDES. 

 Gen. ICHNEUMON, Linn. 



1. Ichneumon Blakei, Cresson. 



Ichneumon Blakei, Cresson, Proc. Ent. Soc. Philad. iii, p. 139. 

 One % specimen. 



2. Ichneumon montanus, Cresson. 



Ichneumon montanus, Cresson, Proc. Ent. Soc. Philad. iii, p. 141. 

 Four 9 , seven % specimens. Two females have a more or less dis- 

 tinct whitish annulus on the antennae. 



3. Ichneumon pedalis, Cresson. 



Ichneumon pedalis, Cresson, Proc. Ent. Soc. Philad. iii, p. 141. 

 One 9 , two £ specimens. The 9 has the antennae porrect. sericeous, 

 and shorter than in % ; the wings are uniformly tinged with fuliginous, 

 instead of fus< nus ind the legs are dark, rufous, with the tarsi more or 

 less (1 



4. Ichneumon semilaevis, Cresson. 



Ichneumon semilcevis, •■ sson, Proc. Ent. Soc. Philad. iii, p. 142. 



Two 9 specimens 



5. Ichneumon macilemus, a. sp. 



Black: face, spot before tegulse and most of tibiaj and tarsi, yellowish; wings 

 subhyaline: central area of inetathorax quadrate. 



Male. — Long and rather slender, dull black; the face, inner orbits, 

 clypeus except its basal margin and a spot at tip, the mandibles except 

 extreme base and apex, and the palpi, yellow ; antennae dull black, two- 

 thirds the length of the body, stout at base and gradually attenuated 

 towards the tip, basal joint beneath witb a yellow line. Thorax shin- 

 ing, very closely and finely punctured, slightly pubescent; pleura cov- 

 ered with fine punctures and somewhat longitudinally striated, espe- 

 cially behind; a small yellowish spot immediately before the teguhe ; 

 scutellum smooth and polished, with a deep excavation in front; ineta- 

 thorax opaque, finely rugose, the elevate 1 lines well defined, the central 

 area moderate, quadrate, somewhat elevated and flattened. Wings 

 uniformly tinged with pale fuscous, honey-yellow at base; nervures 

 blackish ; areolet subtriangular or slightly subrhomboidal. Legs black ; 

 a spot on the four anterior coxae and trochanters beneath, tips of their 

 femora, and the basal third of the posterior tibise beneath, yellow ; the 

 four anterior tibiae, and all the tarsi, dusky-yellow, the posterior pair 



