106 Journal New York Entomological Society. [Vol. xvi. 



outer margin ; stigma broad, not strongly tapering. Sheath broad at base, lower 

 margin tapering to apex ; cerci long, very slightly tapering. Color reddish-yellow ; 

 clypeus, labrum, mandibles (the apices are piceous), cheeks below eyes and tegulae 

 in part, white; two basal and part of third antennal joints above, eyes, ocelli, spot 

 on lateral lobes of mesonotum, suture between scutellum and mesonotum, metanotum, 

 postscutellum, middle of basal plates, base of posterior coxse, a spot above and sheath 

 above, black ; base of ventral and tergal segments brownish ; sheath with long hairs. 

 Wings hyaline, iridescent ; costa and stigma white, nervures pale brown. 



Habitat. — Ute Creek, Costilla Co., Colo., 9,000 ft., July 2, 

 1907 (L. Bruner). Type in the Entomological Department of the 

 Univ. of Nebraska. 



This species does not seem to be closely related to the other 

 American species. 



It was quite a surprise to find these two new species of Camponiscus 

 in a lot of Tenthredinidae sent me by Mr. H. S. Smith, of the Uni- 

 versity of Nebraska. There is but one other species of the genus 

 known from North America ( C. americanus Marl., Can. Ent., p. 251, 

 October, 1896) and it is from New York and New Hampshire. This 

 is an excellent example of how little we know of our saw-fly fauna ! 

 I give below a table with which to separate the American species of 

 this genus : 



1. Clypeus very shallowly emarginate ; frontal crest strongly broken; stigma and 



costa white ; antenna? reddish yellow albostigmus, new species. 



Clypeus deeply emarginate ; frontal crest not or but slight'y broken ; stigma 

 yellowish hyaline ; antennae dark above 2 



2. Middle fovea deep ; scutellum in part black ; meso-epimera and femora infus- 



cated ; no black spots on mesonotum americanus Marl. 



Middle fovea shallow; no black on scutellum; meso-epimera and femora not 



infuscated ; two dark spotson lateral lobes of mesonotum... smithi, new species. 

 5. Pteronus costillensis, new species. 



Female. — Length 5.5 mm.; length of anterior wing 5.5 mm. Not very 

 robust. Head not as wide as thorax ; labrum rounded at apex ; clypeus very 

 shallowly emarginate, lobes broad, rounded ; middle fovea circular, rather deep ; 

 antennal joints three, four and five equal ; ocellar basin distinct, lateral walls running 

 to lateral ocelli ; lower wall broader and rounder than lateral walls ; frontal crest 

 somewhat curved anteriorly, slightly broken. Claws deeply notched, teeth equal. 

 Venation normal ; stigma broadest at base, tapering to apex. Sheath broad, slightly 

 obliquely truncated at apex, hairs on apex small; cerci rather long, not noticeably 

 tapering. Color reddish-yellow, somewhat darker on vertex and dorsulum ; ocelli, 

 eyes and abdomen somewhat black above; antenna; a little darker above; clypeus, 

 labrum, mandibles (apex piceous) and coxae pallid. Wings hyaline, iridescent ; costa 

 and stigma very pale yellowish brown, rest of nervures darker. 



Habitat. — Sierra Blanca, Costilla Co., Colo., 10,000-11,500 ft., 



