AMERICAN HYMENOPTERA. 215 



Tribe 1. 



1. S. terminalis. 



Tenthredo terminalis, Say, Long's 2nd Exp. ii, 1824, 318, 

 Allantus terminalis, Norton, Bost. Jour. vii. 236, i. 

 Strongylogaster terminalis, Norton, Bost. Proc. ix. 120. 

 Allantus melisoma, Harris, Cat. 



Testaceous: tips of antennae and scute] yellow-white, part of mesothorax 

 and pectus black. Length 0.46. Br. wings 0.80 inch. 



9 — Color testaceous ; body quite long, abdomen flattened, the basal 

 joint of antennae more than twice as long as second ; third longer than 

 fourth, apical joint pointed, the two basal joints testaceous, the three 

 next black, the four apical joints white; head wide and thick, polished, 

 nasus deeply incurved, labrum concave, rounded, all reddish-yellow; 

 scutel, a line behind, and postscutel, whitish; a spot back of ocelli, 

 the two side lobes of mesothorax. the sutures of first and second seg- 

 ments of tergum, and the pectus, black; coxEe blackish, with a white 

 spot, sometimes indistinct, on the upper side ; tips of posterior femora 

 and sometimes of tibioe black ; wings slightly clouded, basal half of 

 stigma whitish. 



Mass., Conn., N. J., Pa.. West Va. 



Common. A variety from the Kanawha Valley, (Coll. Am. Ent. 

 Soe.) is smaller, has the basal joints of antennae almost black ; the ver- 

 tex, most of metathorax and the pleura (except a variable central spot) 

 black ; tips of all the coxae, trochanters and base of femora white. 

 The amount of black is variable. 



2. S. mellosus. 



Tenthredo terminalis, % , Say, Long's 2nd Exp. ii. 1824, 318, 

 Allantus mellosus, Norton, Bost. Jour. vii. 1860, 237, 2. 

 Strongylogasier mellosus, Norton, Bost. Jour. ix. 120. 

 Testaceous; tips of antennae, V-spot, scutel, and two spots on pleura, white ; 

 mesothorax and pectus black. Length 0.37 — -0.45. Br. wings 0.67 — 0.80 inch. 



9. — Color and form of body as in S. terminalix ; the two basal 

 joints of autenniB testaceous, the three next black, and the remainder 

 white, the apex at times brown; nasus and beneath, a minute dot at 

 edge of occiput, back of ocelli, sometimes a spot more or less distinct at 

 summit of inner orbit, white ; teguh>3, collar, V-spot scutel and line be- 

 hind and a small spot or two on pleura, yellow-white ; an irregular lo- 

 bate spot about and back of ocelli, the metathorax, a baud at junction 

 of first segment and the breast, black; legs testaceous, apex of all the 

 coxse, most part of hinder pair, and the trochanters white ; base of coxa) 

 and tips of hinder femora black ; wings as in S. tenniiialis. 



