28 



determined by the difference in proportions (e. g., you think 

 the thorax is proportionally more slender than in C. purpu- 

 rea) ; second, by difference in punctures, length of mandibles, 

 number of teeth and punctures on the labrum, etc., if any dif- 

 ference is observable ; third, by difference in colors and spots 

 (e. g., that of the head and thorax, which in your insect are 

 green ; and the absence of the oblicme band, which in pur- 

 purea never attains the external margin, whereas the abbrevi- 

 ated band in your figure appears to be rather a triangular 

 marginal spot) ; and lastly, by distinctness of locality. On this 

 head you would do well to observe whether your Cicindda is 

 found isolated, and not in company with purpurea (which 

 last I have never found except in dry pastures) ; and whether, 

 if, aggregated with purpurca, it keeps itself unconnected with 

 that species, uniting only with such as resemble it entirely 

 in color and marking. You probably well know that the $ in 

 this genus has the anterior tarsi dilated, with white pulvilli be- 

 neath, while that of the 9 is slender and simple. 



Your having met with another species of Chremastocheilus 

 confirms Mr. Kirby's conjecture that we probably have several 

 species of this genus. My paper has been published, and you 

 probably have seen it. Since I wrote you I have seen the 

 Zoological Journal for April, 1826, in which Mr. Kirby ac- 

 knowledges the receipt of an insect of the genus from me, 

 which he describes in full as the C. castanece, but which, as I 

 have informed you, he subsequently considered as distinct. 

 He describes, also, in the same Journal, the species from 

 Georgia, by the name of variolosus. This appears somewhat 

 to resemble C. Sayi mi, but no mention is made of the abun- 

 dant hairs which clothe the latter. 



In the note which I am to furnish the next volume of the 

 Journal, which will also contain the figures of these insects, I 

 shall propose a new name for the first species. Mr. Kirby has 

 already redescribed and named it. 



Your mentioning the habits of Notoxus and Cantharis (Lytta 



