222 EDWARD NORTON. 



depression; clypens retracted, crenate ; labnim angulate ; face imma- 

 culate; tegula3, collar, venter and coxae paler than rest of body ; pleu- 

 ra dark, almost piceous; legs color of body; wings hyaline, stigma and 

 costa pale yellow. 



Mass., (Harris' Coll.) One 9 . 



Resembles jV. luUns of Europe. 



Four submargiiial cells. The second recurrent nervure received at junction 

 of second and third cells. 



."52. MESSA, Leach. 

 Me-isa, Leach, Zool. Misc. 1814. 

 Fenusa, Ilartig, Die Blattw. 256. 

 Tenthredo, Khig, Fain. viii. 



Wings — One marginal and four submarginal cells, the second elon- 

 gate and reciving two recurrent nervures, the second at the intersec- 

 tion of second and third cells. Lanceolate cell petiolate. 



A))f('»n!v 9-articulate, the third article longest, remainder beyond 

 the fourth decreasing gradually to the apex. 



Bodi/ short and stout. 



i/rr/s slender, simple; tibias with two short acute spurs at tlie tip. 



Authors differ in opinion as to this genus. It is allied to Nematm 

 in its neuration, and to the following genera in the form of its anten- 

 nae. Leach put it in his Stirps VI. with Selandria and Athalla. 1 . — 

 Messa. 2. Athalia. 3. Selandria. 4. Fenusa. Hartig considers it 

 the same with Femtsa, which he makes a subgenus of Athalia. Lepel 

 calls it a subgenus of Nrmatus, with which it is here classed. 



1. M. hyalina. 



Messa hyalivn, Norton, Proc. Ent. Soc. Phil, iv, 1864,8, ]?., 9. 

 Black, with white tegulas and legs, and clear wings. Length 0.16. Br. wings 

 0.36 inch. 



9. Shining black; body stout; antennre slender, longer than to 

 base of abdomen, setaceous, first joint longer than second, third longer 

 than fourth. Head polished, rounded, almost smooth about the ocelli; 

 nasus slightly incurved ; labrum wide, rounded and, with the mandi- 

 bles at base and the teguhc, white ; abdomen somewhat stout and 

 acute ; legs white, the coxae black, except at tip, posterior femora with 

 a reddish tinge, tips of their tibiiu blackish. Wings perfectly hyaline, 

 stigma almost wholly white, first submarginal cell somewhat rounJed, 

 third almost square; second recurrent nervure almost coinciding with 

 second submarginal cross nervure; lanceolate cell petiolate; under 

 wings with two middle cells. 



New Jersey, (Coll. Am. I^nt. Soc.) One 9 . 



