300 RHOPALOCERA. 



This is one of the commonest species of American Hesperiidse, ranging throughout 

 the tropical portions of that continent and reaching an altitude of from 3000 to 

 4000 feet in the mountains. As might be expected, considerable variation occurs in 

 different individuals, chiefly affecting the size of the spots crossing the primaries ; these, 

 as a rule, are smaller in Central American than in more southern examples, but many 

 exceptions occur. The white silvery spot on the secondaries beneath also varies 

 greatly, but, so far as we can see, not according to any law of distribution. We are not 

 aware that the true E. exadeus passes the northern limit of Mexico ; it is replaced in 

 the United States by E. tityrus, and this last-named species is said to occur in Mexico, 

 but we are unable to confirm this statement. 



The male genitalia have a short tegumen ending in two rather sharp points ; the 

 scaphium is well developed and reaches nearly to the end of the points of the tegumen ; 

 the harpes have the end slightly upturned, the terminal portion of the dorsal edge 

 being distinctly serrate, at the end of the basal half of the dorsal edge arises a large 

 lobe tapering to a blunt end, from which proceed a fascicle of strong spines directed 

 forwards and slightly upwards. (See Tab. LXXVII. fig. 1.) These organs are exactly 

 like those of E. tityrus, the type of Epargyreus. 



2. Epargyreus gaumeri, sp. n. (Tab. LXXVII. figg. 2, 3 s .) 



E. exadeo similis, sed alis ad basin vix ferrugineo tinctis ; posticis snbtus fere immaculatis. 



Hab. Honduras, Ruatan Island (Gaumer). 



Mr. Gaumer's collection from Ruatan Island contains three specimens of this form 

 of E. exadeus. These differ from all the continental specimens in having the second- 

 aries beneath nearly spotless and without a trace of the silvery- white patch. They are 

 generally darker, this feature extending even to the colour of the palpi. 



3. Epargyreus asander. (Tab. LXXVII. fig. 4 s .) 



Eudamus asander, Hew. Descr. Hesp. p. 9 x ; Ex. Butt v Eudamus, t. 3. f . 24 2 . 

 Epargyreus asander, Wats. P. Z. S. 1893, p. 24 3 . 



Alis fuscis ad basin dilutioribus ; anticis fascia transversa obliqua venis quadripartita, macula ultra earn, et 

 punctis tribus snbapicalibus (duobus costalibus conjunctis, tertio magis distante) ocbraceo-hyalinis : subtus 

 anticis maculis byalinis ut supra, costa et area apicali olivaceo-albo lavatis ; posticis olivaceis albo prsecipue 

 in dimidio distali albo atomatis, fascia lata mediana alba margine suo interno bene definite-, margine 

 externo indefinite-. 



5 mari similis. 



Hab. Mexico, Mazatlan, Ciudad in Durango (Eorrer), Jalisco (Schumann), Chilpancingo, 

 Acapulco, both in Guerrero (H. H. Smith), Jalapa, Rinconada (W. Schaus), Cordova 

 (JRumeli), Atoyac (H. H. Smith), Valladolid in Yucatan (Gaumer); Guatemala, Volcan 

 de Santa Maria (Richardson), San Geronimo, Duefias (Champion) ; Honduras, San 



