THE CANADIAN ENTOMOLOGIST. 205 



on the side with head up. Number three pupated July nth, on the side 

 of the box, head up ; number four changed July 14th, suspended from 

 the top the same as number one, all of them at an angle with the object 

 to which they were attached, as is usual with Papilios. Numbers one and 

 three produced imagines July 15th and 29th, or after a pupal period of 

 fifteen and sixteen days respectively. August 4th, numbers two and three 

 remained unhatched, having remained in this state thirty-six and twenty- 

 four days, and they presented no indications of hatching. At this time I 

 turned the box on its side, so that the heads were suspended downward 

 instead of pointing upward. August 7th both produced perfect imagines. 



Among my captures of Catocalae this season in this vicinity, are C. 

 marmorata Edw., C. sappho Streck., and C. delilah Streck., on white oak 

 trees, the last June 29th, the second July 18th and 19th, and the first 

 September 7th. 



DESCRIPTIONS OF NEW ICHNEUMONID^. 



BY E. T. CRESSON, PHILADELPHIA, PA. 



Genus Mesostenus Grav. 



Mesostenus nubilipennis. — %. Black; anterior orbits, lower part 

 of cheeks, spot on middle of face, most of clypeus and labrum, spot on 

 mandibles, annulus on antennae, line on sides of collar, spot on each side 

 of prothorax above, spot on disk of mesothorax, most of scutellum, dot on 

 post-scutellum, tegulae, spot beneath, spot on sides of pleura, spot on each 

 side behind posterior wing, two elongate marks on metathorax behind 

 covering the prominent, obtuse and transversely compressed tubercles, the 

 four anterior coxa?, spot on posterior pair above, annulus at base of pos- 

 terior tibia?, extreme base and apex of the first joint of posterior tarsi, the 

 second, third and fourth joints entirely, and the apical margin of segments 

 1-6 of abdomen, all white ; front unarmed ; thorax opaque ; mesothorax 

 confidently punctured ; metathorax reticulated ; wings hyaline, with a 

 fuliginous cloud beneath stigma, areolet quadrate, closed ; legs fulvous, 

 extreme tips of posterior femora, their tibiae except white annulus near 



