40 [August 



figure leaves no doubt of the species intended. No remarks are made 

 on the striking discrepancy in the size of the head and prothoracic 

 parts which at once separate Boisdiival's figure and our common spe- 

 cies, from the Cuban species. I need not state here that the ornamen- 

 tation of the two species is, with a certain resemblance, quite distinct, 

 while I can in no wise account for the remarks of Dr. Herrich-Schaeffer, 

 except upon the hypothesis that no rigid comparison has been insti- 

 tuted by the author between his specimens and Boisduval's figure, for 

 I cannot suppose that Geratomia repentinus occurs in Cuba, or has 

 been sent him by Dr. Gundlach. 



With regard to the position of our species T have elsewhere noted 

 that it seemed to me ill-placed in the same genus with Geratomia 

 quadrirornis, and that, with other whitish cinereous, rough-haired spe- 

 cies of Sphinx, it seemed to form a passage to Geratomia^ in which 

 S. repentinus would constitute the lowest link. 



Deilephila cham^nerii, Harris. 



The larva of this species is stated by Harris to differ from that of 

 the European D. Galii, with which the American species is regarded 

 as identical by Mr. Walker and Dr. Clemens. I find the following 

 differences in the imagos, which I am satisfied are specifically distinct. 

 In our species the central fascia on anterior wings is of a warmer 

 shade, not excavated inwardly at base, and not continued so near the apex 

 as in D. Galii; the apices show a very distinct black streak, absent in 

 the European species. The central fascia of the inferior wings is more 

 suffused with rose-color. The basal abdomiual segment is less black 

 laterally in D. chamaetierii, while I notice a few minor differences which 

 are perhaps not constant, as are those I have cited. The fact that 

 Smerinthus Gerisii Kirby, is certainly distinct from Smerinthas gemi- 

 natus Say, an opinion I have entertained since studying Kirby's de- 

 scription and figure, has been recently ascertained by the discovery of 

 specimens, as I am informed by Mr. S. Calverley, and it may be argued 

 from this that Kirby's Deilephila intermedia, which appears to differ 

 too much to be referred to Harris' species, may be ultimately discov- 

 ered as a distinct species. 



