AMERICAN HYMENOPTERA. 271 



tips) and a band in middle of hinder tibias yellow ; hinder tarsi black ; 

 wings hyaline, nervures black ; lanceolate cell closed. 



Connecticut. One 9 • 



This resembles M. lineata^ but has no stripe across pleura, and its 

 hinder tarsi are black. 



10. M. externus. 



AUantm externus, Say, West. Quart. Rep. II, 1823, 72, J. 



Norton, Bost. Jour, vli, 257, 41. 

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

 "Black; tibiae white on the exterior side. Length nine-twentieths of an inch. 

 Body deep black; head with a spot each side on the nasus and base 

 of mandibles, white ; wings fuliginous; nervures black; thighs at tip 

 above, incisures of the coxae, exterior side of the tibiae and tarsi white, 

 posterior feet robust." 

 Missouri. 



This is like the M. tibiafor, having the mouth, edge of collar, edge 

 of basal plates, trochanters, four anterior tibias and tarsi below yellow- 

 white, and a line on the hinder tibiae about two-thirds as long as tibia; 

 hinder tarsi white above, tips of all the other tarsi black, first joint of 

 hinder tarsi as long as all the rest. The head is quite wide. The spe- 

 cimens examined are not all as large as that of Say, being about 0.35 

 — 0.45 inch in length. Wings almost hyaline, lanceolate cell closed. 

 A variety has a short line in middle of hinder tibiae and the hinder 

 tarsi black. 



Massachusetts, Connecticut. 



11. M. tibiator. 



Macrophya epinotus, Var. b, Norton, Bost. Jour, vii, 257, 42. 

 Macrophya tibiator, Norton, Proc. Ent. Soc. Phil, iii, 1864, 10, 20. 

 Black; two dots back of ocelli, obsolete spots on nasus; edge of collar and of 

 basal plates, a line down all the coxse, and legs below knees, interrupted on 

 every joint ot hinder pair. Length 0.28 Br. wings 0.G6 inch. 



9 . Body short and stout; head wide as thorax, densely punctured; 

 antennae moderate, compressed in middle; two minute dots on edge of 

 occiput back of ocelli, an indistinct spot on each side of both nasus and 

 labrum, spot on mandibles, a slender line around the edge of collar and 

 basal plates white ; a slender line down each of the coxae, forming a 

 spot on hinder pair, joints of trochanters, (hinder trochanter entirely) 

 a line down the anterior legs and down the medial pair below the 

 knees white, with the tips of the tibiae and tarsi black; a short oblique 

 line in middle of hinder tibiae and spot on each joint of tarsi white; 

 tarsal claws apparently bifid; apical half of wing fuliginous; lanceo- 

 late cell closed. 



