THE CANADIAN ENTOMOLOGIST. 257 



balance of insect resinous-yellow, except slight dark spot beneath wings. 



Described from one female and one male bred by Mr. H. G. Dyar, 

 from larvaj taken on willow in New Hampshire and New Jersey. The 

 larvae are described as resting flatly on the surface of the leaves, which 

 they skeletonize, and as being gregarious and, in appearance, shining like 

 a slug. 



Types in Coll. U. S. Nat. Mus. 



Pachynematus piibescens^ Marlatt. 



Male. — Length, S mm,; elongate, slender; head and thorax densely 

 clothed with long sordid yellowish hairs ; clypeus shallowly emarginate, 

 strongly transversely keeled ; ridges about ocellar basin distinct, but slight ; 

 crest not prominent, unbroken ; fovea oval ; antennae very long and 

 slender, joints nodose at tips, fourth and fifth longer than third ; third 

 cubital and second recurrent, and outer veins of discal cell of hind wings 

 interstitial ; third cubital cell large, divaricating apically ; stigma long, 

 narrow, tapering ; procidentia wide, tapering, truncate at tip ; inner tooth 

 of claw very minute. Colour black, shining, including all of head, with 

 mouth-parts, pronotum and tegulje ; apical half of hypopygium, apices of 

 femora, and the tibiae and tarsi, reddish-yellow, infuscated ; genitalia 

 pallid ; wings hyaline, veins brown, stigma yellowish, usually with a 

 brownish tinge, much darker than stigma of apicalis. 



Described from six specimens from Cornell University, collected on 

 Mount Washington, at an elevation of 5,500-6,000 feet, July 9th, 1891. 

 In structural and colorational characters the male of this species is very 

 close to the male of extensicornis, but is readily distinguished by the 

 remarkable hirsute clothing of the head and thorax. 



The female of this species was described in my Revision of the 

 Nematinae of North America. (Tech. Ser. No. 3, U. S. Dept. Agric, 

 Div. Ento., 1896, p. 100.) 



Hemichroa iaricis; n. sp. 



Female. — Length, 5.5 mm; robust; shining; clypeus broadly, shal- 

 lowly, emarginate, and with strong transverse ridge near base ; pentagonal 

 area distinctly defined ; ridges somewhat rounded ; fovea shallow, cir- 

 cular ; antennte very slender, filiform, fourth joint much longer than 

 third ; sheath short, rounded at tip ; cerci short ; claws simple, without 

 inner tooth ; venation normal. Colour black ; mouth-parts scarcely paler 

 than the general body colour, or very slightly reddish ; tegulje and legs 



