AMERICAN HYMENOPTERA. 211 



Catalogue of the described TENTHREDINID^ and TJROCERID^ of 



North. America. 



BY EDWARD NORTON. 



[Continued from Vol. 1, page 280.] 



51. TAXONUS, Meg. 

 Taxonus, Meg, von Muehlfeld. 



Wings with two marginal and four submarginal cells, the second and 

 third each receiving a recurrent nervure ; bullae as in Allantm. 



Antennie 9-jointed, generally shorter than to abdomen, filiform, with 

 the end joint obtuse. 



Head: nasus more or less emarginate, the corners sometimes pro- 

 duced ; labrum bluntly rounded ; mandibles short and thick, with or 

 without a simple inner tooth, seldom with more small teeth; fourth 

 joint of palpi longest. 



Abdomen long, sometimes flattened, polished. 



It is difficult to specify the external distinction between Taxonus 

 and Strongylogaster. 



Tribe 1. Hartig. 



Lanceolate cell with oblique cross-line, under wings without middle cells. 



1. T. nigrisoma. 



Taxonus nigrisoma, Norton, Bost. Proc. ix, 1862, 119. 9- 

 Blue-black, the legs dark rufous. Length 0.30. Br. wings 0.60 inch. 

 9 . Color blue-black ; abdomen rather long, flattened, acute j anten- 

 nae slender, basal joint enlarged, third longer than fourth, apical joint 

 as long as the preceding ; clypeus angulate emarginate ; labrum and 

 base of mandibles pale rufous; legs rufous or honey-yellow; base of 

 coxae and tarsi black; wings faintly clouded, stigma and costa black. 

 Mass, (Harris Coll.). Dorchester, Mass. (F. Q-. Sanborn.) 

 Three specimens. Not conmon. 



2. T. unicinctus. 



Taxonus unicinctus, Norton, Bost. Proc. ix. 1862, 119. 9' 

 Color black, a rufous band on third and fourth segments of abdomen. Length 

 0.30. Br. wings 0.60 inch. 



9 . Black, body long and slender; antennae: third joint longer than 

 fourth, the flagellum rufous beneath ; head polished, lower ocellus in 

 a long basin ending in a blunt projection between antennae, nasus deep- 

 ly incurved; third joint of palpi longest, the fifth springing from the 

 fourth at one side of apex ; mouth yellowish ; tegulae, coxae and troch- 

 anters white; a spot at the tips of first and second, the third and fourth 

 segments of tergum and the second segment of venter, yellow-red ; base 

 of coxae, the anterior coxae above, and the posterior tarsi, black ; wings 

 hyaline ; marginal cross-nervure straight, stigma and costa black. 



