98 THE CANADIAN ENTOMOLOGIST. 



The genus Dinocarsis was erected by Forster in 1856, vide Hymen- 

 opterologische Studien, p, 33, to contain Eucyrtus hemipterus Dalman. 



Dr. Mayr, in Die Europaischen Eucyrtiden, gives the synonymy as 

 follows : 



Dinocarsis hemiptera Dalm. 



Eucyrtus hemipterus Dalm., let. Ac. H. 1820, p. 166 (42) und 371. 



Nees Hym. i. a. M., 1834, p. 252. 

 Dinocarsis hemiptera Forst., Hym. Stud, ii., 1856, p. 37. 

 Dicelloceras vibrafts Six Tijdschr. v. Entomol. 1867, pi. x., f. g. 

 Nothing is known of this European species. Mine, while bred from 

 the case, is evidently parasitic on the eggs enclosed therein. 



NOTE ON PRIONOXYSTUS ROBINI^. 



BY AUG. R. GROTE, A. M. 



Having recently examined the European Cossus (Xyleutes) ligniperda, 

 the generic differences between Cossus and Prionoxystus impressed me 

 quite forcibly. The Cossidcs or Teredines of Hiibner (Grote, Proc. Am. 

 Phil. Soc, Nov., 1874), form a sub-family group of the "Spinners" or 

 Bombycidce, and are generally characterized by the wood-eating habit of 

 the larvae, which are provided with powerful mandibles for the purpose. 

 The moths are generally of a clumsy build and are usually of a gray 

 color, resembling the bark of trees on which they rest, and are more or 

 less reticulated with darker shade lines, peppered and spotted so as to 

 give the idea of protective imitation. The ocelli are wanting and the 

 tongue is rudimentary. In the genus Cossus, and in most of the genera 

 of the group, the vestiture of the body is close, thick and hairy. Although 

 gray is the prevailing color, some Australian species have the hind wings 

 especially of a reddish-brown hue. The European Zeuzera Aesculi is 

 white, spotted over wings and thorax with steely blue. The North 

 American genus Prionoxystus differs at first sight by the sparse, thinly 

 laid on, scaly vestiture. The thorax, compared with Cossus, is elongated 

 and the prothorax slopes to the head, which latter is freer than in Cossus. 

 This gives the insect a Sphingid appearance which, joined to the more 

 pointed wings and the yellow secondaries of the male, recalls certain 

 Macroglossince, notably our Lepisesia flavofasciata. The parts of the head 

 afford comparative differences when examined and compared with Cossus. 



