BUFFALO SOCIETY OF NATURAL SCIENCES 37 



female of this species. It is larger with the slender apex of 

 the pronotum longer and the suprahumeral horns longer, more 

 acute and recurved. The last ventral segment has a shallow 

 notch with the margins rounded and but little oblique on either 

 side. The femora, coxae and the pectoral surface about them 

 are black; the trochanters, tibiae and tarsi brown. In the 

 Cornell University collection are two similar females from 

 Georgia. 



This species belongs to the group with short angular supra- 

 humerals. In form it comes nearer to basalis but the pronotum 

 is higher in front and more convexly arched above. The last 

 ventral segment of the female has about the form found in 

 bubalus but its notch is still more shallow. The apex of the 

 tylus is armed with stiff blackish hairs but the surface of the 

 pronotum is not hairy as in basalis. 



5. Ceresa taurina Fitch. PI. i, fig. 19. 



A somewhat smaller species than bubalus with more terete 

 and very acute suprahumerals which slope upwards and are 

 quite strongly curved backward especially in the females, and 

 the metopidium is distinctly concave transversely. The last 

 ventral segment of the female is much longer than in the fore- 

 going species and has the outer hind angles rounded and much 

 advanced beyond the last segment of the connexivum and the 

 edges strongly oblique and a little arcuated to the acute median 

 notch. I have taken taurina occasionally about Buffalo, in 

 Welland Co., Ont., and at Fort Collins, Colorado; and have 

 specimens taken by Mr. Palmer at Mt. Balsam, N. C. 



6. Ceresa IIHnoiensis Godg. 



This species is known to me only through Goding's de- 

 scription. It seems to be very near to constans and taurina. 



7. Ceresa constans Walker. PI. 1, figs. 7,27. 



In August 1907 I took a small series of this species on bass- 

 wood trees growing among the hills south of Buffalo and have 

 received others from Mr. Metcalfe beaten from basswood trees 

 at Ottawa, Ont. Here the outer angles of the last ventral seg- 

 ment of the female are produced beyond the sixth segment of 

 the connexivum in a rounded lobe, and the median sinus is 



