AMERICAN HYMENOPTERA. 237 



joints piceous at base only ; clypeus but slightly emarginate, labrum 

 rounded; parts of mouth piceous. the clypeus sprinkled with black; 

 scutellum white; the second, third, fourth and fifth segments of abdo- 

 men piceous ; legs piceous ; all the coxae and the four posterior femora 

 black ; posterior tibiae and tarsi dark above ; wings slightly smoky, 

 nervures black ; basal half of stigma white. 



Brooklyn, N. Y. (J. Akhurst.) 



The wings are quite in proportion to the length of body. 



26. T. pectoralis. 



Tenthredo pectoral is, Norton, Proc. Ent. Soc. Phil. III. 1804, H. 22. 9. 

 Black; the mouth, cheeks, tegulse, collar, pleura and body beneath, white. 

 Length 0.36. Br. wings 0.72 inch. 



Z . — Black; antennae not longer than to first segment of abdomen ; 

 third joint one half longer than fourth; labrum rounded; face below 

 antennae, cheeks, an oval dot above base of each of antencaa ; tegulae, 

 collar, pleura and the whole of body beneath, white; upper edge of 

 pleura and a large semicircular line on pectus black ; legs black above 

 and white beneath, coxae mostly white; wings fiiintly clouded on the 

 apical half, nervures blackish. 



Rocky Mountains, Colorado. (Coll. Am. Ent. Soc.) 



The antennae i-esemble those of Macrophya. 



21. T. rufopectus. 



AUantus rufopectus, Norton, Best, Jour. vii. 1860, 258. 38. 9 'S • 

 Tenthredo rufopectus, Norton, Bost. proc. ix. 121. 

 Black, antennae in part, pectus and legs rufous. Length 0.40 — 42. Br. 

 wings 0.85.— 90 inch. 



9 . — Black, body not very stout; antennae long and slender; color 

 ferruginous, tips of joints above black, sometimes also the two basal 

 joints; labrum rounded; labrum, base of mandibles and palpi, tegulse, 

 collar, and four radiating lines on ridges of metathorax, yellow; a white 

 spot above base of posterior coxae ; pectus and legs orange-red ; the 

 four anterior tibiae and tarsi and the medial femora tipped with black ; 

 apex of posterior femora, apical half of tibise and their tarsi black ; 

 wings hyaline, basal edge of stigma and the costa pale. 



% . — The male has a yellow spot on each side of the disk of clypeus 

 and on the pleura over each of the four hinder coxae ; the first and 

 second segments of abdomen and the basal segments of venter some- 

 times indistinctly rufous. 



New England, New York, Pennsylvania, Illinois. 



A specimen from Illinois has the venter white beneath. 



28. T. rufipes. 



Tenthredo rufipes, Say, Long's 2nd. Exp. II. 1824, 317. 3. 9 . 



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

 AUantus rufipes, Norton, Bost. Jour. vii. 1860, 255. 37. 

 AUantus lev.costoma, Kirby, Faun. Bor. Am. 1837, 256. 354. 



TRANS. AMER. ENT. SOC. (31) JANL'AKV, 1869. 



