EEMARKS ON THE SYNONYMY OF SOME NORTH A:\IE11- 

 ICAN SCOLYTID BEETLES. 



By the late AVillia^i Eichhoff, 



Of Strasburg, Ciermany. 



(Translated and annotated by E. A. Scliwarz.) 



DuRiNa the year 1S9l>, Professor 0. V. Riley entered into correspoud- 

 ence with William Eichhoff, of Strasburg, Germany, the well-known 

 authority on Seolytidie, with a view of getting this rather diflieult 

 family of Coleoptera properly identified for the U. S. National Museum 

 collection. The correspondence resulted in exchange of specimens, and 

 a series of our North American species was sent to Mr. Eichhoff by the 

 Museum, care being taken to select such species as, upon comparison, 

 with the types, would throw light on the confusion in synonymy between 

 the North American species described by Chapuis and Eichhoff on the 

 one hand and Zimmermaun and Le Conte on the other. Some time 

 before his death, Mr. Eichhoff sent an exchange series, partly composed 

 of exotic species, which form a valuable addition to the Museum collec- 

 tion, and partly of North American species, mostly of his own types. 

 The'correspondence included very full synonymical remarks on many 

 species, and these Professor Riley deemed of sufficient importance to 

 justify publication. I have, therefore, at his special request, trans- 

 lated the substance of Dr. Eichhoft''s determinations and comments, 

 and added in brackets some notes of my own.— E. A. S. 



HYLASTES RUFIPES, Eichhoff. 



Hulastesinmfex, Fitch, and U. rujlpes, Eichhort', while both of them 

 belong to the genus Hylnrgops, Le Conte, are specifically quite distinct, 

 differing more especially in the form of the antennal club. Quite char- 

 acteristic is the form of the epistoma in H. ntiipes, and your Hylesmus 

 opaculus, as figured in the Annual Report of the Commissioner ot Agii- 

 culture for the year 1878 ^ and is probably referable to irylastes rujipvs. 

 Quite recently I have received from Mr. A. D. Hopkins two specimens 

 of a Scolytid which have the same formation of the epistoma and which 

 no doubt belong also to Hylastes rujipes. Finally, I would suggest 



' riate V, fig. 3 a. 

 Pro.-ee.lin.'s of tlio United Statea National Museum, VOL. XVIII-No. 1085. 



