NO. 1215. REVISION OF THE GENUS TRIMEEOriiOPIS— MCNEILL. 449 



DESCRIPTION OF PLATE XXI. 



Fig. 1. Right tegnicn of Trhnerotropii^ aaxatiUs. 7.s/ .1 and ;?(^ . I, first and nec-oiul, anal 

 veins; v. v., crosH veins at end of area M; Ca, cubitus, (Jn^ and (Jn.^, forks 

 of cubitus; C'»,/, branch of C'»,; /, intercalary vein; M, media; M\ & a and 

 3/3 & 4, forks of M; R, radius; A'j and R^, first fork of radius and radial 

 sector; Rj, 7^^, R^S, first, second, and third l)ranches of 7^; Sr., sul)costa. 



Fig. 2. Right wing of Trwievotropis saxatilis. The letters and numerals have the 

 same significance where they are the same, and in addition -iil .1, third 

 anal vein; iid .1, and L'd A^ represent the first fork and the sector of 2(1 A; 

 2d A^2, .second, branch second -1; R.^ & 3 and R^ & 5, second and third, and 

 fourtli and fifth forks of the radius; 3d A^, .id A.^, etc., fir.«t, .second, etc., 

 branches of third .1; C, costa; *S', spurious veins. 



Fig. 8. Right tegmen of Metator purdalhia Sauss. /, intercalary vein; S, spurious 

 veins dividing areas formed by the accessory branches of the j)rincipal 

 veins. 



Fig. 4. Right wing of C7rco^d/u.' »)«/«/«<».? Thomas. ,!;«/., anterior field; Jfic/., middle 

 field; Post., posterior field; A', radiate veins, Ijranches of 2d Siiid .3d A; G, 

 interplical grooves occupied by spurious veins. 



Fig. 5. Right tegmen of CuaozoawaUida Bcudder. 



Fig. 6. Right tegmen of Derotmeina liajjdenii Thomas. 



Proc. N. M. vol. xxiii 20 



