228 EDWARD NORTON. 



3. T. xanthus. 



Tenthredo xanthus, Norton, Proc. Ent. See. Pbila. III. 1864, 13. 26. 9 . 

 Honey-yellow; base of antennae, mouth, edge of collar and spot above poste- 

 rior legs white; neck and spot on pectus black. Length 0.52. Br. wings 0.92 

 inch. 



5 . — Color honey-yellow ; abdomen very long. Antennae not reach- 

 ing beyond first segment of abdomen, color black, the two basal joints 

 and part of third beneath yellowish; head large; an indistinct line on 

 inner orbits and a dot above each antenna, flice below, tegulse in part, 

 collar with a connected dot beneath j sides of basal j)lates and spot above 

 posterior coxae, white or straw color; the prothorax, front of anterior 

 lobe, a spot at base of side lobes of mesothorax, pectus, a narrow line in 

 the joints of the first second, third and fifth segments of tergum and 

 part of the apex beneath, black; legs the color of body, their anterior 

 coxae and the two anterior pair before, pale; anterior inner spur two- 

 thirds the length of first tarsal joint, widely bifid; hinder legs long 

 and stout, wings smoky yellowish, nervures black, costa and basal ner- 

 vures rufous, base of stigma pale. 



Var. a. A triangular white spot on pleura. 



Var. h. The antennae whitish beneath. 



Pike's Peak, Colorado. (Coll. Am. Ent. Soc.) 



Many specimens. The number and size of the black spots on the ab- 

 domen varies. 



4. Tenthredo ruficolor, n. sp. 



Black ; base of antennae, head, thorax above, and apex of abdomen yellow- 

 red. Length 0.52. Br. wings 0.96 inch. 



9 . — Body long. Antennae moderate, black, the two basal joints 

 yellow ; head large ; the head, tegulae, thorax above, edges of basal 

 plates and apical half of abdomen rufous or honey-yellow; a faint pale 

 dot at summit of inner orbits, face below antennae, collar, sides of ba- 

 sal plates and a spot beneath straw-yellow ; back of head, a large spot 

 on side lobes of mesothorax, pleura, pectus and three basal segments of 

 abdomen black ; legs rufous; coxae, a line on basal half of intermediate 

 femora above and on apex of posterior tibiEe black ; anterior tibiae above, 

 pale; wings smoky, base of stigma and the costa pale, nervures darker. 

 Canada. (Coll. Am. Ent. Soc.) 2 $ . 



5. T. verticalis. 



Tenthredo verticalis, Say, Longs. 2nd. Exp. IL 1824, 317. 2. 9 



Norton, Bost. Proc. ix. 1862, 121. 

 AUantus verticalis, Norton, Bost. Jour. vii. 1860, 250. 28. 9 %. 

 Black ; part of head, tegulffi, collar, V-spot, scutel, basal plates and bands on 

 abdomen yellow. Length 0.40 — .48. Br. wings 0.82 — .88 inch. 



9 . — Black, abdomen long and flattened ; antenna; black, a spot on 



