322 
[December 
the base of the thorax, black, deeply punctured, the punctures becom¬ 
ing finer and more dense towards the apex, sides parallel, gradually 
rounded at tip; humeri prominent; lateral margins not extending to 
the tip of the elytra, reddish-yellow; a slight elevated longitudinal line 
on the middle of each elytron, not quite reaching either the tip or the 
humerus. Beneath black, subsericeous. Legs blackish; femora, ex¬ 
cept tips, reddish; tibiae and tarsi tinged with reddish. Length 4i 
lines. 
This may possibly be an extreme variety of A. hivittata Say, but 
the thorax in front is not so much constricted as in that species. It 
was collected in Hampshire Co., Virginia, and presented to the Society 
by Dr. Thomas B. Wilson. 
Note. —Having submitted several of the insects described by me 
in the pages of these Proceedings to Dr. John L. LeConte, for examin¬ 
ation, he expressed a doubt in regard to the legitimacy of Desmocerus 
elongatus (Vol. 1, p. 269), believing it to be nothing more than a 
deeply stained specimen of palliatus. He recommended the specimen 
to be well soaked in benzine and ether. This was accordingly done, 
and upon examination his surmises were found to be correct,—the in¬ 
sect having recovered so much of its color as to place the question 
beyond a doubt. The Doctor also determined that my Cyclocephala 
liirida is nothing more than a variety of G. immaculata. As I have not 
at my command sufficient material for a satisfactory comparative exam¬ 
ination of the insects, I must give up the species, although I do it with 
much doubt. 
I am not at all surprised to see that Dr. LeConte, in his “ LisV’ p. 
50, lately published by the Smithsonian Institution, has made Cychrus 
Ridingsii Bland, a variety of Andrewsii. When I undertook to de¬ 
scribe the insect, I was well aware that this was his opinion, as I had 
been informed that he had compared the insect with his specimen of 
Andrewsii^ and had pronounced them one and the same. Having 
come to a different conclusion, after comparing it with seven specimens 
of Andrewsii (four in the collection of the Society and three from the 
cabinet of Dr. Lewis), I did not hesitate to describe it as a new spe¬ 
cies,—and it gives me pleasure to say that the question has been set 
at rest, very unexpectedly, by my friend Mr. H. Ulke of Washington,— 
