470 

 OIMS'I'HOCIKAP'IMS lliibiicv. Platu (i, fig. 5. ' 



Opititlioyraplin Hiilin., Ver/.., WJU, l-il^. 

 Eunumus 'J'rcils., Scbm. Em'., vi (i), :!, 1827. 

 liinnid \tn\t., Lrp. I'i;incc, vii (iv), 117, l.-i-iSI. 



Vm\>i\.. (icii. Iml., If^-Z, l.-<40. 



I)iiI).,C;it., -JKi, 1H44. 



Il.-Sdi., Sclnii. Km-., iii, o4, lf:;47. 

 Opislliiiiii-nplin tjti'pb , Cat. Di-. Lep., llici, lei50. 

 Humiii Lc<l<-rfr, Vcrli. Tiot. Ziiol. Gt-s. Wii-ii, 17(i, 185:i. 



(iiu'ii.. riijl.. i, 108, 18.".7. 



\V:illi., l.i.st Lop. H.'t. Br. Mils., xx, i;i7, 18tW. 

 Jlcsjirriimia Park., Proc. Bo.st. Soc. Nat. Hist... xvi, 37, 1674. 

 Pack., I'ildi Rr]i. P.'ab. Acail. Sci., 7'.', 1871. 



Head, l)()(ly, uiid palpi as in Siri/ii Male antemue iiiuie heavily pec- 

 liiiated iSiaii in Sic\i/(/ : in ihe leiuale simple. Fore wings triangular, the costa 

 .-traiglit : apex snhreclaugiilar, the outer edge long, ol)lique, without any 

 angle in the outer edge. Hind uing.s large and full: outer edge full and 

 rounded, uitli a .slight .sinus just liefore the middle of the outer edge; they 

 reach a little l)cyond the end of the abdomen. Venation : costal vein anas- 

 tomosing with the snlicostal. Si.x sul)eostal venules, the first very slunl, one- 

 half as long as tiie second, anil co-originating with the first from a common 

 branch: the third and fourth oriiiiuatinij; from a common branch: no sul)- 

 costal cell. 'I'lie independent vein i,s situated rathei' nearer the sixth subcostal 

 vein than usual; the anterior discal venule being short, while the po.sterior 

 one is obfujue, but not much curved. Male hind legs much as in Sic_//a; the 

 tibite are very slightly swollen : the tarsi about one-fourth shorter than the 

 tibia'. C'oloration: straw-yellow, with no markings except tliiee costal spots, 

 tile middle one of whicli connects with a very large oval discal spot. 



This genus difi'ers from Siri/i/. Antcp'ioHf, and Heterulnchd in the lore winas 

 lieing entire, not falcate, the outer edge regularly conve.N, )U)\ e.\ca\ated. mid 

 the hind \\in;j;s riMinded, not angular on theoutei' edge, aiul having a. faint 

 sinus l)elow ihe apex. It is more closely allied to Aitgcjvjta than any 

 other .\merican ueuus of this subfiuiiily, beiuii' lilve that gemis in the entire- 

 lore uinys and in the sinus in the hind vviiiiis. The fore wings are a little 

 pointed at the apex, and less anaulated in the mitldle of the outer edge. I'he 

 subcostal venules aie shorter, sent more directly to the costa, and the costal 

 interspace; narrower. Hind It^gs as in Angcro/ia, the spurs of the same relative 

 size. The femah; is smallei" than the male, while in Angemna the female 

 is consideiably lari.'er than the male. .\t first regarding our species as geiieri- 



