September 1S97.I 



PSYCHE. 



119 



some excuse for Osborn's redcsciiption 

 as the original description of iinicolor- 

 atus (not " unicolorous") is not exact 

 as regards female segment. A bent 

 condition of the abdomen gave a very 

 improper view for this part. Relaxing 

 and remounting show it to be identical 

 with oculattis. 



Deltocephalus argenteohis Uhl. I 

 have typical specimens of this species 

 from Dr. Uhler, and also abundant 

 material collected by myself on the plans 

 in northern Colorado. I have also the 

 types of curtipennis and terebra)is and 

 further specimens of both collected in 

 1896. Such an error as the reference 

 of these two species to argenteohis 

 seems inexcusable. Argenteohis is 



small, slender, the female segment 

 nearly truncate, the head immaculate, 

 and the general color when fresh a bril- 

 liant, resplendent green. Curtipennis 

 and terebrans are much larger, the 

 head more obtuse, and heavily maculate, 

 the female segment deepl}' emarginate, 

 and the general color dull brownish 

 cinereous. Terebrans was referred to 

 Eutettix on account of the rather 

 unusually strong transverse depression 

 before the tip of vertex. It is an 

 Athysanus and mav prove the fullv 

 winged form of curtipennis, but there 

 is less than no proof for it now, and 

 hence for the present they must be kept 

 separate. 



THE LARVA OF CROCOTA OPELLA 

 GROTE. 



Egg' Slightlv more than hemispherical, 

 not narrow at base, flat below; shining 

 pearly, faintly yellowish ; diameter .55 mm. 

 Reticulations obscure, narrowly linear, like 

 fine lines traced on the otherwise smooth 

 and level surface, more or less elongate, 

 irregularly hexagonal. 



Stage I. Head bilobed ; pale reddish 

 brown; width .3 mm. Body whitish with 

 very long black hairs, single, normal, i-v 

 present. Hair spinulated, i-iv black and 

 especially long. Tubercles large, the edges 

 adapted in slope to each other, luteous gray. 



Stage II. Head whitish, eye black, mouth 

 brown; width .38 mm. Body whitish, the 

 warts concolorous; i very small, one-haired; 

 ii large, many haired. Feet all pale. Hairs 



slender, black, many of fair length and a few 

 much larger, distributed all along the body. 



Last stage. Head black above, clypeus 

 and sutures brown; width i.S mm. Body 

 uniform dull gray, warts and plates black. 

 Hair stiff, black, short and uniform e.xcept 

 from wart ii on thorax and iii on abdomen 

 where it is long, forming a curious ridge of 

 hair the whole length in the middle of each 

 side. No marks. 



Cocoon a slight sticky web of white silk. 

 The pupa recalls Hyphatitria in appearance. 



The eggs are laid at the end of July and 

 the larvae hibernate about half grown. The 

 egg patches are placed on the leaves of bushes 

 and trees, but the larvae drop to the ground 

 on hatching. They eat almost any tender 

 leaves, as with other Arctians. Found at 

 Greenwood Lake, N. J., and Bellport, Long 

 Island, N. Y. Harrison G. Dyar. 



