OPSIPHANES. 127 
afterwards procured by one of Mr. Hague’s collectors in the Polochic valley, and 
forwarded to us. We have no knowledge of the extension of this species further 
south, beyond the doubtful reference to its occurrence in Honduras given by Boisduval?. 
It appears to be a scarce insect, being, like other members of the genus, of crepuscular 
habits, and very rapid, powerful flight. 
3. Opsiphanes cassie. 
Papilio cassie, Linn. Mus. Ulr. p. 265*; Cram. Pap. Ex. t. 106. f. A’. 
Opsiphanes cassie, Butl. Cat. Fabr. Lep. p. 41°. 
Caligo fabricit, Boisd. Lép. Guat. p. 54%. 
Alis fuscis, anticis fascia transversa a costa ad angulum analem ducta (costam versus bifida) ferrugineo- 
ochracea ; posticis fascia submarginali coloris ejusdem; subtus fuscis griseo marmoratis, litura a cellula 
ad angulum analem fusca, figuris ad basin nigris, anticis uno, posticis ocellis duobus ornatis. 
Hab. Mexico, Vallalolid, Yucatan (Gawmer); Guatemata, Polochic valley (Hague), 
central valleys and Retalhuleu (FP. D. G. & O. S.); Honpuras (Mus. Brit.) ; Nicaracua, 
Chontales; Costa Rica, Cache (Rogers); Panama, Chiriqui (Avcé).—Co.LomBia; Ecuapor; 
Peru; Guiana?; BRaAzIu. 
This name of Linnzus evidently refers to this insect, as he specially calls attention to 
the fulvous band of the primaries bifurcating near the costa, whereas in O. invire this 
band is simple. Evidence is not wanting, however, pointing to the probable identity of 
these so-called species; for the band of the primaries is not only of very variable width, 
but also a transition can, to a certain extent, be traced between the simple straight band 
and the bifurcated one, and this without any reference to locality. 
In our region O. cassie is decidedly the most abundant form; indeed, with the single 
exception of a Costa-Rica example, O. invire is not represented at all. 
4. Opsiphanes invire. 
Potamis superba invire, Hibn. Samml. ex. Schm. i. t. 76°. 
Brassolis invire, Hiibn. Sammi. ex. Schm. ii. t. 66. 
Opsiphanes cassia, Butl. & Druce, P. Z. 8. 1874, p. 339° (nec Linn.). 
O. cassie persimilis, sed fascia anticarum fere recta nec bifida forsan distinguendus. 
Hab. Costa Rica (Van Patten®).—Co.LomBia ; VENEZUELA; PERU; Amazons; Brazi; 
PaRraGuay. 
The chief, if not the only character by which this species is distinguished, is in the 
band of the primaries being simple, and not bifid towards the costa. Our Costa-Rica 
example, though referred to O. cassie by Messrs. Butler and Druce, seems clearly to 
belong here. Compared with O. cassiv, O. invire has in our region a much less 
extensive range, and only enters Central America as far as Costa Rica, whence we have 
a single specimen. 
