THE CANADIAN ENTOMOLOGIST. 195 



NOTES ON TWO SPECIES OF TENTHREDINID^, FROM 



YOSEMITE, CAL. 



BY HARRISON G. DYAR, ROXBURY, MASS. 



Schizocerns tristis, Cress. 



var. fumipennis, ;/. var. 



Eight exani]jles bred from larvae in the Yosemite Valley differ from 



Mr. Cresson's description in having both wings uniform smoky blackish, 



about as dark as the hind wings of Hylotoma scapularis, Klug. In the 



? , the pale parts of the legs are not white, but of an obscure sordid 



whitish, tinged with brown, and not contrasting with the black body 



parts ; the abdomen is obscurely banded with brown between the 



« 

 segments. 



Length of V , 6 mm. ; $ ,'$ mm. ; expanse of wings, $> > r 3-5 mm. ; 

 6* , 1 1 mm. 



Larva. — Head rounded, wider than high, the mouth parts pointed ; 

 clear green, shaded with black across the middle ; ocelli black, mouth 

 brownish ; width, i mm. Thoracic feet large, the abdominal ones small, 

 present on joints 5-10 and 13 (10 pairs in all). A slight subventral 

 ridge ; body transversely creased and covered with round, smooth, con- 

 colorous, wart-like elevations, uniform green, the dorsal vessel showing 

 darker by transparency ; a stigmatal row of black dots. The anal plate 

 terminates in four short pointed projections tipped with black, and there 

 are two others below the anus. Thoracic feet dusky. Length of larva, 

 about 10 mm. 



Cocoon. — Formed on the back of a leaf: oblong, rounded, symmetri- 

 cal, composed of coarse yellowish silk of loose and irregular texture, not 

 compact enough to be opaque. 



Pupa. — Eyes prominent, cases free, the wing cases small; abdomen 

 cylindrical, slightly tapering ; colour clear green, the legs colourless, eyes 

 black and two blackish shades on the thorax, as well as at bases of wing 

 cases. 



Food plant — Hosackia grandiflora, Benth. 

 Labida opimus, Cress. 



A 9 example differs considerably from Mr. Cresson's description : — 

 var. Bigemina, n. var. 



Head black ; clypeus, labrum, mandibles (except at tip), palpi, 

 lower half of cheeks, and elongate oval spot resting on the insertion of 



