THE CAXADIAX ENTOMOLOGIST. 171 



at once of diffinis. But the terminal segnients in diffinis are not " ferru- 

 ginous " any more than in utiiformis, and so Kirby may have had a boreal 

 species we do not yet know before him. From his description there is- 

 no more corresi)ondence with Jinifonnis than Avith thysbe ; rather does his 

 description agree with fuscicaudis as to the abdomen terminally. 



Cressonia Jug/andis, p. iv. To this species must be cited Sm. paUens 

 of Mr. Strecker, whose figure represents a pale % specimen of C. 

 juglandis, without the median shade on the forewings. Belfrage has sent 

 C. juglandis from Texas. 



Dysodea || p. vi. This generic name is preoccupied and must give 

 way to that of Platythyris. Mr. Walker's type of Varnia appears • 

 distinct. "We have probably but one species which should be known as 

 Platythyris ocidataiia. Boisduval's figure and description of Vitruia do 

 not agree with our species, and probably vitrina represents oculatana in 

 Europe. Much confusion has occurred through Dr. Clemens having 

 described the species figured by us, Am. Lye. Nat. Hist, N". Y., vol. viii, . 

 pi. i}^^ figs. 4-5, as one of the Tortricidae, and without referring to 

 Boisduval's original illustration of the genus. A second species is 

 afterwards described by Dr. Clemens under the name of Dysodia viar- 

 gai-itaiia, which I have never seen. Consult Am. Soc. Beige, T. 7, PL i, 

 for an illustration ot the embryonic stages of Thyris. They seem to 

 correspond generally very well with Dr. Clemens' characters of the larva 

 of Dysodea. 



NOTES ON MEGACHILE CENTUNCULARIS. 



UV THOS. G. GENTRV. GERMANTOWX, PA. 



Since so much has been written upon the habits of our ordinary 

 Eeaf-cutting Bee, it would seem presumptuous for me to ofter anything 

 further in connection therewith. But a few facts which came to my notice 

 recently are sufficiently interesting and important to merit publication. 



During the latter part of June, 1873, several cells, a half a dozen in 

 number, were sent to me by a friend, who had accidentally brought them 

 to light while digging underneath the shade of a Spiraea corymbosa. They 

 were found in close proximity to each other, arranged in a nearly 

 horizontal position, at a depth of three inches below the surface of the- 



