AMERICAN HYMENOPTERA. iOt 



Catalogue of the described TENTHREDINID^ and TJROCERIDiE of North 



America. 



BY EDWARD NORTON. 



[Continued from Page 31.] 



Lanceolate cell closed in niidill<\ 



r>l. NEMATUS. 

 Ne^naius, Jurine, Nouv. Meth. 1807, 59. 

 Leach, Zool. Misc. 

 Lepel, Men. Tenth, fff, 62. 

 Hartig, Die Blattw. Sec. 2, Tr. 2, 184. 



WIjujs ample, one marginal and four submarginal cells, the first and 

 third small, the second large and receiving two recurrent nervures ; 

 the first generally rounded, with the dividing nervure sometimes very 

 indistinct, only to be seen by holding up to the light; four submargi- 

 nal bullae, viz. : one in middle of each transverse nervure and a long 

 one on the submarginal vein beginning at the first recurrent nervure, 

 and that on the third transverse nervure quite wide j lanceolate cell 

 petiolate; under wings with two middle cells. 



Antennse 9-articulate, elongate, slender, simple, third article gene- 

 rally largest, remainder gradually decreasing in length. 



Head transverse; clypeus emarginate; mandibles with one inner 

 tooth; fourth joint of maxillary palpi not short; the inner lobes of 

 maxillae with a tooth-like edge or pectination. A suture-like groove 

 generally passes down the face from summit on each side of ocelli, 

 connected back of ocelli by a cross groove, more or less distinct. Be- 

 tween the antennae a ridge, channeled above, is produced. 



Body short, subcylindric in the males, broader and depressed in the 

 females. 



Legs simple; two sharp spines at the apex of tibiae; claws in gene- 

 ral with an inner tooth. 



LariFe twenty-footed (six pectoral, twelve abdominal and two cau- 

 dal). They present quite a variety of habits, as will be seen by the 

 following table. (Dahlbom.) 



a. Feeding upon leaves of plants, gooseberry, willow, etc., resting at t)ie 



edges or on the surface of leaves. 



b. Feeding upon the leaves of pines, social: resting at the edges of leaflets, 



forming a simple cocoon. 



c. Living in galls of plants, c. 1. — Gall-makers, Walsh. 



2. — Inquilines, Walsh. 

 They are generally social in habit and are often very destructive, 

 eating off all the leaves. 



TflA.VS. AMEU. ENT. SOC. (25) AUGUST, 1867. 



