64 PSYCHE [June 



LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.— LIV. 



RY HARRISON G. DYAR, WASHINGTON, D. C. 



Hyperitis triangtiliferata Packard. The life history of this species has been described 

 b_> Professor G. H. French (Can. ent., xviii, 105, 1886) from Californian larvae, with four 

 stages. I present my own descriptions, however, as I have noted some points not mentioned 

 by him and the larva has not been otherwise referred to. 



Egg. Elliptical, rounded, one diameter less, no flattening nor depression ; truncation 

 marked, oblique. Longitudinal ribs low, obscure, straight, few, about six visible on the 

 broad side, joined by cross-striae, forming cells three times as wide as long; ends reticulate 

 Pale yellow; size i X -7 X .6mm. 



Stage I. Head rounded, testaceous, a little darker on the vertex, e^e black, mouth 

 brown. Body moderate, not greatly elongate, rapidly looping or held rigid with a thread. 

 Whitish, a broad dorsal band of smoky olivaceous and a still fainter ventral one, scarcely 

 more than a shade. Feet pale; tubercles very small, brownish ; setae moderate, glandular 

 tipped ; no shields. 



Stage II. Head rounded, the lobes full, sordid whitish with black dottings on the 

 lobes and around the mouth ; width .6 mm. Body moderate, greenish, shaded with blackish 

 olivaceous dorsally, with subdorsal and lateral lines indicated by white segmentary dashes, 

 a white stigmatal line with black and gray spots, tubercle iv largest on joints 7 and 8. 

 Venter orange tinted, obscurely lined and marked by blackish blotches at the tubercles. 

 Tubercles roundedly elevated; setae obscure ; feet pale with dark lines; a geminate ventral 

 whitish band. 



Stage III. Head whitish with pale brown dots forming bands curved transversely, 

 antennae prominent, pale, ocelli black; width i.i mm. Body moderate, the segments 

 enlarged centrally by the conical tubercles, especially joint 7. Pale brown ; subdorsal line 

 broken into white dashes, the longest one on joint 5, edged with black shading ; sides 

 shaded; substigmatal band broad, yellowish white, illy defined but distinct ; a paler subven- 

 tral line; centers of segments subventrally and venter inedially black shaded; tubercles 

 conical, black, ii prominent, especially on joint 7. Feet pale ; setae very short ; ana! shield 

 and leg plates pale. 



Stage IV. Head round, cuneiform, the lobes full above, held flatly ; light and brown 

 mottled on the sides, pale over the face and vertex ; width 1.7 mm. Body cylindrical, joints 

 2 and 3 depressed, their feet appressed, those of joint 3 erected; straight, stick-like, joint 7 

 humped dorsally, tubercles ii forming high cones on joints 7 and 9, less so on joints 6 and 

 8, small on joints 5, 11 and 12. Whitish green, washed with brown of light and dark ; an 

 oblique lateral streak on joints 3 and 4, the fronts and backs of the high tubercles, irregular 

 marks and blotches on the sides, especially of joints 7 to 9 and a partly continuous subven- 

 tral hand. Ordinary markings lost. Feet of joint 10 brown behind, pale before ; thoracic 

 feet bright led shaded. Faint whitish washed longitudinal lines. 



The larvae fed on currant {^Ribcs sajiguiticutn) ; bred from eggs obtained at Kaslo, 

 British Columbia. 



