12 



no record of species taken in the spring nor do we remember ever re- 

 ceiving specimens from Arizona in the spring time. 



In contra-distinction to this we have Oslar's interesting account 

 of t he habits of Strcckeri (Ent. News, XI, 495). According to 

 his observations the S $ oi the species ilew very rapidly in the 

 hot mid-day sunshine and were extremely wary and difficult of ap- 

 proach ; the 2 9 , however, remained concealed in the shade, emerg- 

 ing from their retreats for the purpose of ovipositing at dtisk, and 

 continuing their flight well into the evening. On May 27th they were 

 "all more or less battered and worn" but a week later "a fresh crop 

 of perfect specimens was just out." This might be construed as a 

 second brood ; it is probable, however, that the emergence of the spe- 

 cies is very irregular, owing partially to the larval habits, and extends 

 over a long period of time. It has often been remarked too that 

 species indigenous to mountainous districts have a much more ex- 

 tended period of flight than those found at low altitudes ; the country 

 around Durango where Oslar made his observation is all above 5,000 

 ft. altitude and often subject to sudden changes of temperature. 



In recapitulation of the above the family may be defined as fol- 

 lows : 



Antennae never hooked ; apex of club almost truncate, slightly drawn out 

 and bent. Palpi upturned, stout, third joint very short. Primaries with the 

 cell equal to two-thirds the length of costa, vein M; arising nearer to M3 than 

 to Ml ; secondaries with vein M: from below middle of discocellular, slightly 

 weaker than others. Mid and hind tibiae strongly spined and with single apical 

 pair of spurs. Male sex without either stigma or costal fold. 



GENUS AEGIALE Feld. (Type Ae. hesperiaris Wlk.) 



Aegiale Felder, Wien. Ent. Monats, IV, no (i860) ; Kirby, Syn. Cat. Diur. Lap. 



608 (1871); Butler & Druce, Cist. Ent. I, 116 (1872); Scudder, Proc. 



Am. Acad. Arts & Sci., X, 103 (1875); Riley, Trans. Acad. Sci., St. 



Louis, III, 341 (1876). 

 Teria Blasquez, (non Swainson, 1820) La Naturaleza, I, p. 282 (1870). 

 Acentrocneme Scudder, Proc. Am. Acad. Arts & Sci., X, 100 (1875) ; Kirby, Syn. 



Cat. Diur. Lep. Suppl., 829 (1877) ; Druce, Biol. Cent. Am. Lep. Het., II, 



319, (1896); Mabille, Gen. Insect. Fam. Hesp. 184 (1904)- 



We have retained Felder's generic name, although Scudder, on 

 the ground that Aegiale Feld. would clash with Aeyialia Latr. (1807), 

 proposed an Mss. name of Felder's, Acentrocneme, in its place. Ac- 

 cording to the existing laws of zoological nomenclature we see no 



