236 EDWARD NORTON. 



22. T. tricolor. 



AUantus tricolor, Harris, MS. 



Norton, Bost. Jour. vii. 1860, 247, 22. J . 

 Tenthredo tricolor, Norton, Bost. Proc. ix. 121. 

 Black; mouth, sides of basal plates and spot below, white; apex of abdo- 

 men rufous. Length 0.48. Br. wings 0.95 inch. 



$ . — Black ; antennfe long and slender; the two basal joints rufous 

 within ; mouth, sides of basal plates and a round dot above posterior 

 coxse straw-white ; the four basal segments of abdomen black ; remain- 

 ing segments above and beneath rufous; the coxae, base of anterior fe- 

 mora, four posterior femora, posterior tibiae and first joint of tarsi black, 

 (^the two latter with a rufous tinge); remainder of legs rufous; wings 

 hyaline, basal half of stigma pale. 



Maine. (Harris Coll.) One specimen. 



23. Tenthredo mutans, n. sp. 



Black; mouth, cheeks and four anterior legs beneath yellow; abdomen and 

 hinder femora rufous. Length 0.44. Br. wings 0.84 inch. 



% . — Black; antennae moderate; mouth, cheeks, a spot above pos- 

 terior coxae and the four anterior coxae and legs straw-white ; abdomen 

 rufous, except the two basal segments ; posterior femora rufous ; a line 

 down the four anterior legs and the posterior tibiae and tarsi black ; 

 wings hyaline, faintly clouded. 



Canada. (Coll. Am. Ent. Soc.) OneS . 



This is allied to T. Signatus. 



24. T. semirubra. 



Tenthredo semirubra, Norton, Proc. Ent. Soc. Phil. III. 1864, 14. 29. 9 . 

 Black; mouth white; apical half of abdomen rufous. Length 0.54. Br. 

 wings 0.98 inch. 



9 . — Black ; antennae moderate, slender, joints enlarged at tips, 

 slightly flattened beyond the middle ; labrum rounded before ; parts 

 of mouth pale yellow ; the two basal segments of abdomen black, re- 

 mainder rufous ; abdomen lengthened ; legs black ; the anterior tibia? 

 before, all the spurs, and tarsi of the two anterior pair and apex of last 

 joint of posterior tarsi, piceous ; wings faintly yellowish. 



% . — The intermediate as well as anterior femora and apex of tibia? 

 before, white. 



25. T. piceocinctus. 



AUantus piceocinctus, Norton, Bost. Jour, vii. 1860, 249. 26. J. 

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

 Black; antennae piceous beneath, scutellum white, a piceous band on abdo- 

 men. Length 0.52. Br. wings 0.85 inch. 



9 . — Dull black, abdomen very long, antennae long; third joint but 

 little longer than fourth; color piceous beneath, the first and second 



