252 THE CANADIAN ENTOMOLOGIST. 



except at tip; small spot, including ocelli, tip of scutellum, meso-post- 

 scutellum, and central area of metathorax, hind coxse and base of abdo- 

 men beneath, dark brown ; more or less of meso-epimera, femora, especi- 

 ally hind pairs, and tips of hind tibiie and hind tarsi, brownish or infus- 

 cated ; veins light brown, with yellowish hyaline portions, especially to- 

 wards base of wings ; stigma very broad, yellowish hyaline. 



A/a/e.—J.ength, 5 mm.; much more slender than female; antenna; 

 more robust, compressed, not relatively much longer than antennae of 

 female ; third cubital cell of anterior wings subject to much variation, 

 bordering cross lines sometimes almost touching each other. Colour red- 

 dish-yellow and black ; upper edge of antennae, including all of two basal 

 joints, large spot surrounding ocelli, lateral lobes of mesonotum, 

 scutellum, metathorax, and abdomen, for the most part dorsally, together 

 with spot on pectus and base of abdomen ventrally, with bases of pos- 

 terior coxae, brownish-black ; legs uniformly reddish-yellow ; hind tarsi 

 slightly infuscated ; veins little darker than in female ; stigma yellow 

 hyaline or very slightly infuscated about margin. 



Described from two specimens, male and female, reared by H. G. 

 Dyar, from larvae on poplar, taken at Jefferson, N. H. This species is 

 the first representative of the genus Camponiscus found in America. It 

 seems to be distinct from any European species, and is a very interesting 

 addition to our insect fauna. 



A female of this species was also received for identification from Mr. 

 Alex. McGillivray, collected at Franconia, N. Y. This specimen meas- 

 ures 8 mm., and presents a rudiment of a marginal cross nerve. The 

 metathorax and the venter of the abdomen basally, as also the hind tibiae 

 and tarsi, are unicolorous with the body. 



Pteronus ostryce, n. sp. 



Female. — Length, 6 mm.; moderately robust; clypeus very broadly 

 circularly emarginate, lobes small ; pentagonal area with distinctly 

 elevated limiting walls ; crest unbroken ; fovea deep, triangular ; antennae 

 long, tapering, third and fourth joints subequal ; sheath short, rather 

 robust, regularly tapering ; claws deeply and evenly cleft ; venation about 

 normal ; upper discal cell of hind wings considerably exceeding lower ; 

 stigma broad, regularly rounded on lower margin. Colour for the most 

 part light greenish-yellow ; antennne, compound eyes, large spot, including 

 ocelli and extending back over occiput, lobes of mesonotum and 

 metanotum and base of dorsal sclerites of abdomen centrally, apex of 



