58 THE CANADIAN ENTOMOLOGIST. 



known and readily distinguished, it is very difficult to obtain the males 

 either by collecting in the field or by breeding. Of such may be instanced 

 Nematus Erichsonii, Hart. ( = N. cinctus, Newra , according to Kirby), of 

 which I have only obtained one male, although the females can be taken 

 in any desired number. 



Acordulecera saginata, Pro v., is apparently the male of A. dorsalis, 

 Say., a species which is found upon oak and hickory, the larva; skeleton- 

 izing the leaves. 



Nematus rufocinctus, n. sp. Female — Length. 8 mm. Black, with 

 pale legs and rufous band on abdomen. Head rather small ; the ocelli 

 in shallow basins defined anteriorly by a distinct sinuate ridge above the 

 antennae ; edge of clypeus, labrum and palpi whitish ; antennas slender, 

 with subequal joints. Thorax polished ; tegulte, angles of prothorax and 

 legs in great part, white ; the anterior and median femora touched with 

 brown ; posterior legs with apical two-thirds of femora, apical half of 

 tibiae and the tarsi, black ; wings large, hyaline ; nervures and stigma 

 black ; third submarginal cell quadrate, small, hardly larger than first ; 

 the recurrent nervures received about one-fourth respectively from the 

 base and tip of the second submarginal cell. Abdomen robust, with 

 dorsal ridge ; basal plates, sides of first segment, spots on fifth, and the 

 terminal segments black, remainder rufous. 



One female taken near Hull on 26th June, 1887, upon alder, and in 

 general appearance resembling a small JV. Erichsonii, Hart. 



Nematus thoracicus, n. sp. Female — Length, 6 mm. Head, rneta- 

 thorax and base of abdomen black, remainder rufo-testaceous. Head as 

 wide as thorax, ridges surrounding ocelli ill-defined, but prominent be- 

 tween antennas ; palpi and mandibles pale, the latter with red tips ; 

 antenme long and slender, joints subequal. Thorax rufous, except sutures 

 below wings and the scutellar region, including the scutellum, black ; legs 

 rufous, the posterior with tips of tibiae and the tarsi almost black ; wings 

 hyaline, nervures and stigma brownish, third submarginal cell one and 

 one-half times as long as wide ; recurrent nervures received respectively 

 about one-fifth from base and one-sixth from apex of second submarginal 

 cell. Abdomen short and stout, slightly ridged dorsally ; basal plates 

 and spot on first and second segments black, remainder rufous. 



One female taken near the city on May nth. This species is near 

 JV. bivittatus, Nort, but the head is much less rugose, and the mesothorax 

 is not lineate with black, etc. 



