AMERICAN HYMENOPTERA. 231 



10. T. formosus. 



Tenthredo formosus, Korton, Proc. Ent. Soc. Phil. Ill, 1S64, 14, 28. 

 Black ; inner orbital lines, face below antennae, cheeks, collar, spot on sides of 

 8cutel,on pleura and venter white; apex of tergum and posterior femora rufous. 

 Length 0.50. Br. wings 0.98 in. 



9 . — Body very loni^; antennae moderate, third joint one half lon- 

 ger than fourth ; a line from near the occiput, interrupted half down 

 the inner orbit on each side, face around and beneath antenna?, cheeks, 

 tegulte, collar, spot ou each side of scutel, with an outer side spot, three 

 dots beneath on each side of postscutel, edge of basal plates, a large 

 spot on pleura, with one before and two behind it, and the venter, ex- 

 cept at tip, white ; the five apical segments of tergum and apex of ven- 

 ter rufous ; the coxae, trochanters, most part of anterior legs, of mid- 

 dle femora and basal third of posterior femora, white ; intermediate ti- 

 bia3 and tarsi and most part of posterior femora and tibiae, rufous ; a 

 slender black line down the two anterior pair of legs, the base of pos- 

 terior femora above, the apex of tibiae and their tarsi, black ; apical 

 half of wings somewhat clouded, nervures blackish ; stigma at tip 

 black, its base and the costa pale rufous. 



S . — The male has most of the tergum rufous and the breast and 

 coxae of a waxen color. 



Maine, Massachusetts. 



11. Tenthredo eximius, n. sp. 



Black; inner orbital spots, mouth, tegulse, collar, angular mark and spot on 

 pleura, white; apical half of abdomen red. Length 0-48. Br. wings 0.94 inch. 

 9 . — Black, abdomen not very long; antennae moderate, slender; a 

 short inner orbital line, face about and beneath antennae, tegulae, col- 

 lar, a wide angular spot on pleura, a spot before and another behind 

 and basal half of venter, white ; the four basal segments of tergum 

 black ; remainder of abdomen rufous ; legs whitish, becoming rufous 

 towards the tarsi; a short line on anterior femora at tip, and on base 

 of their tibiae above, a line down the medial femora and tibiae and most 

 part of posterior femora and tibiae black, with a whitish line beneath; 

 wings hyaline, clouded toward apex. 



% . — The male has the inner orbital line extending to summit of 

 eye ; the pectus and all the legs are waxen white ; a black line down 

 all the legs above. 



Summit of Mt. Washington, New Hampshire (Baron Osten Sack- 

 en); Maine (A. S. Packard, Jr.). 



12. T. dissimilis. 



Allantus dissimilis, 'K or ton, Bost. Jour. vii. 1860, 250, 29. 

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



