North Atnerican IIymeno]}tera. 



299 



Tengyka, Latr. Klu^-. 



p 



T, stygia. Black ; mandibles piceous at tip. 



Inhabits Indiana. 



Body entirely black, immaculate, punctured: mandi" 

 hies piceous at tip ; near the tip one-toothed : ivings hya- 

 line ; nervures black, separating nervure of the first and 



second cubital cellules wanting : stigma obvious, black : 

 ahdomen, se^rwents contracted near the incisures: oviduct 

 not extending beyond the terminal processes and con- 

 cealed beneath them. 



Length two fifths of an inch. 



Resembles T. sanvitdlij Latr., but is larger, with a 

 much larger stigma, and each abdominal segment is much 



r 



more contracted before its posterior incisure. 



Methoca, Latr. 

 M. bicolor. 9 Rufous ; head and part of the tergum 



■^ 



black. 



Inhabits Indiana. 



Body pale yellowish-rufous, polished ; head black : 

 antemuB rufous, terminal joints piceous: mandibles and 

 palpi rufous : thorax, segments subequal ; anterior and 

 posterior ones convex, subovate, intermediate one with 

 two slightly elevated convexities : abdomen ovate-subfu- 

 siforra : tergum with a transverse, triangular black spot 

 at the tip of the second segment, another on the third, 

 the remainino- ones confluent. 



Length one fourth of an inch. 



The abdomen does not contract abruptly to the petiole 

 but subsides gradually. Vander Linden says that the 

 species of this genus are the females of species of Ten- 

 GYKA. [Ann. des So, Nat. Jan* 1829, p. 48.] 



