38 



eral of the Nbctuadce, and have completed accurate drawings 

 of the nervures from specimens in my collection ; and I delay 

 completing my labors in this department only till I can obtain 

 a better knowledge of the larv£e and their habits : for where a 

 marked difference obtains in these I have found a correspond- 

 ing difference in neuration ; and on these principles united 

 (together with other easy characters taken from the imago), I 

 should wish the genera which I may propose to be established. 



The small Chremastocheilus you sent me last summer, which 

 had white spots on the elytra, and appeared to be a variety of 

 C. He7itziiy is certainly a distinct species, and comes nearer to the 

 C. castanecB than any other I have seen. Knoch remarks that 

 such spots existed in a specimen which had not been rubbed. 

 The form of the posterior part of the thorax and its angles and 

 punctures are different from those of 0. Hentzii, although it 

 resembles it so closely in many respects. The one you sent 

 me in a letter also somewhat resembles the C castanece. ; but 

 from Kirby's figure and description of the variolosus, I judge it 

 to be identical with the latter. Kirby has described O. Hentzii 

 by the name of O. canaliculatus^ but besides his not noticing 

 the white spots of that species, his description was posterior 

 to mine, and yovir name must be retained as the specific 

 designation. 



C. ccutaneoi? mi, Kirby calls Q. Harrnsii; it is certainly most 

 distinct from the true C. castanece of Knoch. 



HENTZ TO HARRIS. 



Chapel Hill, Oct. 24, 1828. 



I thank you for your very accurate design of the Bysdera. 

 I have now one hundred and four drawings of that family, and 

 \ think I have not more than two thirds of our American spi- 

 ders. The circumstance of your finding the young with the 



