AMERICAN HYMENOPTERA. 225 



Antenvse, 10-articulatc, pilifonu. third article long, remainder gradu- 

 ally diminishing. 

 Europe. 



38. FENUSA, Leach, 

 Fenusa, Leach, ZooL Misc. 1814. 



Hartig, Die Blattw. 256, Sec. 3. 

 Westw. Int. App. 54. 

 Tenthredo {Emj)}iytus) , Klug, Fam. viii. 



Wings — Two marginal and three nearly equal submarginal cells, the 

 first and second each receiving a recurrent nervure ; lanceolate cell 

 petiolate ; under wings without middle cell. 



Antennse 9-articulate, the third joint longest, remainder gradually 

 diminishing in length, apical joint obtuse. 



IL'Uil h\oix(\., transverse; mandibles with one and two inner teeth; 

 maxillary palpi, first joint short, third minute, remainder long and 

 slender. 



Boihj short and stout. 



Lc()s simple; tibiaj with two short acute apical spurs. 



The species of this genus are among the smallest included in this 

 fiimily. 



1. F. curtus. 



FeauHfi curtus, Norton, Proc. Ent. Soc. Phih i, 1861, 199, 9. 



Black ; abdomen piceous ; legs ochraeeous. with black femora. Length 0.14. 

 Br. wings 0.32 inch. 



9. Body stout; antennae toward the tip, labrum and mandibles 

 piceous; a smooth fovea between antennas; tegulte and abdomen pi- 

 ceous ; thorax black, polished ; each segment of abdomen depressed 

 toward apex ; legs ochraeeous, their coxEe and femora, except at tip, 

 black; apical joints of tarsi blackish j wings semi-transparent, stigma 

 and costa dark,nervures black. 



Peun., (Coll. Am. Kiit. Soc). 



2. Fenusa ambiguus, n. sp. 



Black ; middle of tergum, venter and legs yellow-red. Length 0.14. Br. wings 

 0.32 inch. 



% . Body short and stout ; antennae piceous at base beneath ; tegu- 

 la3 and edge of collar whitish, spurs sharp; claws simple; wings hya- 

 line, stigma fuscous at base, also most of costa. 

 Penu. One % . (Smith. Inst.) 



39. FENELLA, Westw. 

 Fetiella,. Westwood, Mod. Class, ii, 1840, App. 54. 

 Brulle, Hym. iv, 662. 

 Wings — Two marginal and three equal-sized submarginal cells, the 

 first and second each with a recurrent nervure. 



TRANS. AMER. ENT. SOC. (29) • SEPTEMBER, 1867. 



