IQO ENTOMOLOGICAL NEWS. [October, 



Su/rn'nfhus geminatus is even more common than exc&catus 

 at times, and I have found the larvae abundant on Populus tremu- 

 loides and willow and sparingly on cottonwood and silver leaf. 

 In searching for the eggs of this Sphinx on the underside of the 

 leaves of aspen I was surprised to find many of them with pale 

 pink blotches and occasionally entirely pink. Suspecting such 

 eggs to have been attacked by some small parasitic hymenopter 

 I was again surprised to obtain healthy larvae from them perfect 

 pupae and imagoes in time. The larva of Geminatus is more 

 slender than that of exc<zcatus and somewhat smaller, but of two 

 well defined types one yellowish pea-green, the other blue- 

 green. The larvae of all Smerinthoids occasionally have lateral 

 rows of red spots or blotches not so well defined as in 6*. my ops. 

 Fully half the larvae of Geminatiis, found on willow, have this 

 character. 



I have noticed but little variation in the imagoes. Have never 

 yet found a specimen with a single instead of a double blue pupil 

 in the eye spot. The pupa is easily distinguishable from that of 

 exc&catus, as it is almost black against the brown of that species. 



Smerinthus myops is rare with us, a single larva having been 

 found by Mr. Ralph Sweet, of Curry ville, Mo., on wild cherry. 

 The caterpillar has lateral rows of beautiful and distinct red spots. 

 I have found some variation in the imagoes, especially the males. 



Neither 6". astylus nor .5". cerisii have been taken in Missouri 

 by the writer, but the former might be sought for in the huckle- 

 berry hills of Callaway County and the Ozark region south of 

 the Missouri River. The larva of astylus feeds on low huckle- 

 berry according to Miss Morton. 



Triptogon modesta is not uncommon with us, and the larva is 



found on cottonwood, silver-leaf and aspen. Mr. Sweet has 



handled great numbers of the larvae and has found them hardy 



and easily managed in muslin bags. The great size of the 



' worm" and its short caudal horn readily distinguish it. 



Cressonia juglandis is rather rare. I have found the larvae on 

 walnut and hickory. Like .5". geminatus the "worm" is of two 

 types of color, yellowish green and blue-green. The body is 

 long and slender, and the larval head long and sharp pointed. 

 The pupa of this species differs much from all other Sphinx 

 chrysalids, having a flattened, triangular appearance, posteriorly. 



