292 PROCEEDINGS OF THE ACADEMY OF 



lower crossvein ; the third externomedial areolet is unusually long, its basis 

 being on the same line with the bases of the discal and of the fourth externo- 

 medial areolets ; the third externomedial vein, instead of issuing from the discal 

 areolet, runs parellel to it and becomes a mere prolongation of the praebrachial 

 vein. Other peculiarities of the neuration are, that the cubital vein forks and 

 not the radial one (at least such is the case in both of my specimens), that the 

 stigmatical crossvein is close at the tip of the subcostal vein, and that there is a 

 stump of a vein near the origin of the petiole. The <^ genital organs seem to 

 be analogous to those of Pedicia. The spurs at the tip of the tibiae of this 

 species are very small, almost imperceptible. 



A. hypeeborea. Fusca, alis fusco maculatis, area pobrachiali media venula 

 transversali instructa ; long. 0'45. 



Very like the preceding, but easily distinguished by the coloring of the 

 wings, by the presence of a supplementary crossvein about the middle of the pobra- 

 chial area, and by the oblique direction of the second lower discal crossvein 

 (similar in this respect to all the other species of Amalopis). 



The only specimen which I possess is spoiled by mould, so that my descrip- 

 tion will necessarily be incomplete. 



Body brownish, antennas brown, feet brownish, base of femora paler, tip of 

 tarsi dark brown. Wings with a slight brownish yellow tinge, and with brown 

 spots at the tips of nearly all the veins, as well as at their anastomoses. There 

 are seven such spots along the anterior margin (one at the humeral crossvein, 

 another a little beyond it, a third at the mediastinal crossvein, a large spot at 

 the origin of the petiole, extending to the anterior margin, the following three 

 at the tips of the mediastinal-subcostal and radial veins); similar, but smaller 

 spots at the tips of the veins of the posterior margin (beginning with the first 

 externomedinl) ; other spots at the base of the pobrachial area, in the middle 

 of the subaxillary area (at the posterior margin), at the basis of the petiolate 

 areolet, of the area formed by the fork of the cubital vein, and a square cloud 

 in the middle of that area; crossveins also clouded. 



The petiolate areolet is present; the stigmatical crossvein is near the tip of 

 the subcostal vein, and there is a stump of a vein near the origin of the petiole. 



Labrador; single <$ specimen. 



Contributions to the Ophiology of Lower California, Mexico and Central 



America. 



BY E. D. COPE. 



Caudisona durissa Law. Cope, Smithsonian Contribntions, v. xii. 

 Researches on the venom of the Rattlesnake, by S. W. Mitchell, M. D., p. 120. 



A male specimen of this serpent (No. 4945) has been sent by Capt. J. M. 

 Dow, from La Union, San Salvador, to the Smithsonian Institution (No. 4945). 

 It is identical with specimens from Surinam in Mus. Academy, exhibiting simi- 

 lar muzzle plates, head and neck stripes, and the isolated black dorsal rhombs 

 upon a yellow ground, with yellow centres. The crepitacula of this species 

 and the C. t e r r i fi c a are much shorter and more compressed than in C. 

 a tr ox and C. h o rr i d a. 



Caudisona atrox sonoraensis Kenn. Proc. Acad. Nat. Sci. Phila. 

 1861, p. 



Specimens sent from Cape St. Lucas, Lower California, to the Smithsonian 

 Inst, and Phila. Academy, by Mr. John Xantns, are more delicately tinted 

 than Sonora specimens. The dorsal rhombs are more perfect, their yellow 

 borders brighter, and their centres paler and similar in color to the lateral 

 interspaces. The scales but little roughened. 



[Sept. 



