1876 THE BUTTERFLIES OF NEW ENGLAND. 



an examination of the specimen to which Dr. Packard referred, and which 

 proves to be a female, and not a male as he supposed. 



Mr. Cresson (Proc. Ent. Soc. Phil., iii : 179, 180) describes three 

 varieties of this species, viz. : incertus, semicoccineus and californicus, 

 differing chiefly in the coloration of the legs. 



Ichneumon caliginosus Cresson. 



Female. — Black, subopaque, deusely and finely punctured ; clypeus shining with a few 

 large punctures ; antennae half the length of the body, black, the 10th to 15th joints 

 white above. Thorax densely and confluently punctured, with an abbreviated im- 

 pressed line on each side of the mesothorax in front ; scutellum rather flat, smooth and 

 shining, with a large white spot occupying nearly Its whole surface and slightly in- 

 dented posteriorly ; raetathorax scabrous, the elevated lines well defined, the central 

 area large and ti-ausversely quadrate. Wings fuscous, nervure black, stigma piceous, 

 areolet 5-angular. Legs shining black, inner side of the anterior tibiae and tarsi 

 whitish. Abdomen entirely black; the first segment broad and finely aciculate, the 

 peduncle slender ; basal f oveae of the second segment deep and oblique ; apical seg- 

 ments rather smooth and shining; ovipositor subexserted, yellowish. Length, 12.5 

 mm. ; expanse of wings, 23 mm. (Adapted from Cresson.) 



Mr. Scudder has sent me one female of this species reared from' Basil- 

 archia archippus September 5. The species has been captured in Canada, 

 Colorado and Illinois. 



Ichneumon instabilis Cresson. 



Ichneumon thurotis Packard. 



i^oHaZe.— Black or ferruginous, rather robust; head slightly narrowed beneath, the 

 anterior orbits more or less red or yellowish ; sometimes the head is entirely red, or the 

 face and clypeus are varied with brown and yellowish or reddish ; antennae moderately 

 long, not robust, generally fulvous at base, yellow in middle and black at tips, some- 

 times only fulvous with tips black, or black at base, then fulvous, yellow and black; 

 third joint elongate, longer than the fourth, which is subequal with the fifth; thorax 

 often entirely ferruginous or more or less varied with ferruginous, sometimes black 

 immaculate, except the scutellum, which is always yellow and polished; tegulae fer- 

 ruginous, often with a reddish spot in front and another beneath ; post-scutellum some- 

 times reddish ; metathorax rugulose, the central area large and subquadratc ; wings sub- 

 hyaline, more or less stained with yellow, uervures brown, stigma pale honey-yellow; 

 legs honey-yellow or ferruginous ; the coxae, tips of posterior femora, of their tibiae 

 and most of their tarsi black, sometimes the most part of the posterior legs is black; 

 abdomen oblong-ovate, subcouvex, slender at base, generally entirely ferruginous, 

 sometimes the fourth and fifth segments above are black or fuscous, sometimes the 

 second and third segments only are ferruginous, and sometimes the incisures of the 

 segments are more or less blackish; beneath ferruginous or yellowish ferruginous, 

 dusky or black at tip. Length, 10-12 mm. 



Male. — This sex is exceedingly variable in color, some examples being almost en- 

 tirely yellowish ferruginous, and others almost entirely black. Head black, with the 

 anterior oi'bits and all beneath the antennae yellow; antennae long, slender, black 

 above and brownish or fulvous beneath, the basal joint yellow beneath; thorax gen- 

 erally black, sometimes more or less varied with ferruginous, and iu one specimen the 

 mesotliorax has four abbreviated, palevittao; sometimes the thorax is black, immac- 



