THE CANADIAN ENTOMOLOGIST. 13o 



Provancher described calidtis from a specimen which I sent to him, 

 and ahhough I cannot now remember the insect, the description shows 

 that it is very close to the species since described by Ashmead as ////r//(?r. 

 Perhaps the latter may be only a variety. 



NEMATUS PALLIDIVENTRIS, FALLEN—A FRESH 



IMPORTATION. 



BY REV. THOMAS W. FYLES, SOUTH QUEBEC. 



In September of last year I discovered the larvae of a species of 

 Nematics feeding upon a willow introduced from Russia by the late Mr. 

 Charles Gibb. Like others of the genus these larvae were gregarious and 

 threw up the hinder parts of the body when disturbed. They were full 

 fed and buried themselves on September 24th. The flies appeared in the 

 end of March. The following is a description of the insect : — 



FuH-grown larva. — One inch long ; head dark brown ; body pale 

 green above with numerous black dots, pale greenish-yellow underneath ; 

 anal segment yellow. 



Pupa. — Enclosed in a dark brown cocoon, less compact than that of 

 N. Erichsonii. 



Imago. — Length of body four lines; expanse of wings six and a-half 

 lines ; head and thorax black ; antennae brown ; ocelli prominent, stand 

 out like black heads ; legs honey-yellow, tarsi of hind legs brown ; abdo- 

 men pale orange, with a dorsal line of triangular spots — a spot to a seg- 

 ment — the obtuse angle of one spot approaching the middle of the base 

 of the next, and so on to the end. 



I submitted the perfect insects to the Reverend Abbe' Provancher, 

 and he has kindly informed me that after careful examination, and com- 

 parison of them with specimens of his own collection, he has come to the 

 conclusion that the species is Nematus pallidiventris., Fallen, of Sweden, 

 France, etc., and that it is a new addition to our Hymenopterous fauna. 

 The insect, he says, is very near to several of our American species but 

 identical with none. 



Should this new importation become established in this country, it 

 will be interesting to watch its progress. 



