THE CANADIAN ENTOMOLOGIST. 58 



FURTHER NOTES ON PACHYBRACHYS. 



BY FRED. C. noWDITCH, BROOKLINE, MASS. 



Among the Mexican material of the late Mr. Jacoby is a specimen 

 from Ventanas, Durango, labelled P. Ventaiiensis, Jac. I find no descrip- 

 tion under this name, and it seems to be the form described as Durango- 

 ensis, Jac. It comes very close to one of the forms I iiave called Snowt, 

 but in the absence of further Mexican material I can only draw attention 

 to it. 



In the Snow collections is a $ specimen from the Santa Rita Moun- 

 tains, Arizona, which I placed provisionally as longiiins, Siiff. There is 

 no example of this species among my Mexican material, and further 

 specimens are needed to fully determine its identity. The form js broad, 

 long and cylindrical, flattened above and rather coarsely punctured ; of 

 the same form as pimdatissimiis, Jac, with narrow, wide thorax. It is 

 the largest species in North America, measuring 6 mm. in length and 3 

 mm. in breadth. 



In the second Jacoby collection under the name omlatus, Suff , is a 

 single $ of the form named by me, Texanus, Can. Ent., 1909, p. 316. 

 What purported to be the type of oculatus, Suff., was lent to me by Prof 

 Taschenburg from the Halle Museum. It did not agree with the descrip- 

 tion of oculatus, and seemed to me to be a specimen o{ pedoralis, Mels , 

 and I have seen nothing which appears to me to fit the description of 

 oculatus. Specimens taken at Wellfleet, Massachusetts, by Messrs. Frost 

 and Bolster, I was at first inclined to regard as the true oculatus, Suff., but 

 finally put them with pectoralis, Mels. The Eastern Coast States is the 

 locality given for oculatus, Suff 



The following forms seem to merit recognition : 



P. notatus, nov. sp. — Large sized, stout, dull black and bright yellow, 

 thorax with three prominent yellow spots on top, elytra fairly regularly 

 striate, punctate. Length, 3^ mm. 



Head yellow, flat, with black vertex, connected with center line, 

 which runs into a crescent mark which ends at the antenn.ie on either side, 

 black marks thickly punctate, clypeal edge also black, sparingly whitish 

 pubescent, especially in the angles of the eyes, which are distant \ antennae 

 dark, lighter towards the base, reaching the hind coxa \\\ ^ ; thorax con- 

 stricted in front and narrowed behind, yellow, with very narrow beading 

 on front margin black, the surface covered by a broad black M, which 

 occupies nearly the whole rear margin and leaves a lateral and anterior 



February, 1910 



