AMERICAN HYMENOPTERA. 239 



?>\. Tenthredo cinctitibiis, n. sp. 



Black ; the mouth, edge of collar, two spots above hinder coxae, a band on all 

 the tibiae and tarsi yellow. Length 0.53. Br. wings 1.00 inch. 



9. — Body long and rather stout; antennae moderate; the joints 

 suddenly dilated at tips; head and thorax dull with dense fine punc- 

 tures, which are coarser, and confluent on the head; clypeus moderately 

 notched, and with the mouth beneath, a broad mark on collar (tegula; 

 black) and two spots above hinder coxae, straw-white ; legs black ; a 

 slender line on the four anterior femora above, and all the tibiae except 

 the tips yellow, (the anterior tibifc before, whitish to apex): anterior tarsi 

 and apical joints of the four others reddish-yellow, wings ample, yellow- 

 ish-hyaline; nervures blackish, base of stigma and all of costa and 

 costal space reddish. 



Caribou Island, Straits of Belle Isle. (A. S. Packard, Jr.) 



This is much like T. flavomarginis, but differs in its banded tibiai. 



32. Tenthredo fumipennis, n. sp. 



Black; mouth and anterior legs before, white; wings fuliginous. Length 

 0.38. Br. wings 0.78 inch. 



% . — Body black; antennae stout, not long, joints enlarged; abdo- 

 men stout, rounded at dnd as in Selandria ; nasus, except in middle, 

 mouth beneath, tips of anterior coxae, anterior femora and tibiae before 

 and aline down the medial femora before, white; wings fuliginous, 

 apical half darkest, nervures blackish. 



Cape Mendocino, California. (Cambr. Mus. Coll. by A. Agassiz, Jr.) 



One male. The lanceolate cell of one wing has a second straight 

 cross line, that on the other wing has four. 



33. T. atroviolaceus. 



AUantus atroviolaceus, Harris, Cat. 



Norton, Bost. Jour. vii. 1860, 255. 36. ^ %. 

 Tenthredo atroviolaceus, Norton, Bost. Proc. ix. 120. 

 Black ; a white sjjot on posterior coxae ; wings sub-opaque, violaceous. 

 Length 0.45—50. Br. wings 1.00—1.10 inch. 



$. — Black; body large, abdomen long, quite stout, flattened ; an- 

 tennge long, stout and compressed ; head, thorax and legs dull with 

 large punctures; labrum almost conical; posterior legs long; a white 

 spot on base of posterior coxse above ; anterior tibiae and tarsi and 

 apical joints of all the tarsi piceous ; wings large, sub-opaque, viola- 

 ceous, with irregular whitish lines along the apical nervures. 



S . — The antenniB of the male are sometimes dark piceous ; the ab- 

 domen is stout, rounded at apex and the under wings without middle 

 cells; their outer cells complete viz. with an outer nervure near the 

 margin, as in T. amhigna of Europe, but the outer nervure of the sub- 

 marginal is partly wanting. The wing is formed as in Ptrineura. 



Canada, Maine, Massachusetts, Connecticut, Pennsylvania, Maryland. 



