334 TRANS. ST. LOUIS ACAD. SCIENCE. 



from two to four ferruginous spots just outside the disc and between the 

 inferior veins.* Beneath, the whole coloration is brighter, the spot between 

 veins 6 and 9 being pure white, the others saflFron-yellow. and the poste- 

 rior portions of all the wings, and a broad costal streak on secondaries, 

 pearly-gray : a spot of the same color is observable on the outer third of 

 secondaries below vein 2, a more distinct and triangular mark on the inner 

 third just below the costal vein ; while the orange superior spots in 2 show 

 dark brown. The antennae are white with the exception of the club; the 

 palpi and front trochanters whitish-gray, deepening posteriorly. The legs 

 are brown with the tarsi but faintly tinged with gray. 



The ten specimens that have come under my observation show consid« 

 erable variation, aside from that which is sexual, in the depth of color and 

 size of the spots, as well as in the distance between them and the hind bor- 

 der of the wing; but none of them have the spot on primaries, indicated 

 in one of Boisduval's figures, just within the middle of the wing and below 

 vein 2. 



AFFINITIES. 



Let US now compare the foregoing detailed characters with the 

 Castnians on the one hand and the Hesperians on the other. 



Scudder, who has certainly given more attention than perhaps 

 any other author to the Hesperians, divides them into two groups, 

 which he considers of tribal value.f The first to which he ap- 

 plies Latreille's name Hesferides is characterized chiefly by the 

 primaries in the c? having a costal fold (often inconspicuous, 

 however) ; by the posterior extremity of the alimentary canal 

 being protected beneath by a corneous sheath, which extends be- 

 yond the centrum or body of the upper pair of abdominal appen- 

 dages, sometimes nearly to the extremity of the appendages ; by 

 the club of antennae being elongate, roundly bent, or with a sinu- 

 ous lateral curve ; by the prevailing color being dark brown with 

 white or translucent angular spots ; by the stout body and swift 

 flight ; by the eggs being distinctly ribbed vertically ; and by the 

 larvae generally feeding on leguminous plants and living in hori- 

 zontal nests made with the leaves. The second tribe, to which 

 he gives Hiibner's name Astyci^\ the front wings of S have no 

 costal fold ; the extremity of the alimentary canal is not protected 



* The secondary sexual characters are confounded by Boisduval, as quoted by Morris 

 (Synopsis of Lap. of N. A., p ii.O) though, as there is no text in the IcoHoffraphie, \i\K 

 error doubtless originated with Morris in making descriptions irom the figures. 



t Bulletin Buflfalo Soc. Nat. Sci., p. 195. 



X I think such diversity of ending in terms used for divisions of the same value should 

 be avoided. 



