On the Purine Butterflies of the Genus Delias. 143 fourth and fifth piuinose from a fine pubescence, which on the lateral bases of the second and third segments tends to form triangular marks. ^ . Like the female, abdomen narrower. Ilab. Euidoso Creek, New Mexico ; six collected by Prof. E. 0. Wooton, viz. :— (1) no. 21, at 6600 feet, July 3, on Erysimum ; (2) no. 49, a variety with the clypeus and supraclypeal area concolorous with tlie rest of the face, at 7500 feet, July 6 ; (3) no. 24, July 3, on Mhmdus luteus ; (4) no. 142, at 6600 feet, July 10, on Rhus; (5) no. 171, at 6600 feet, July 10, on Rhus ; (6) no. 170, also on Rhus with the last. La Tenaja, near Santa Fe, N. M,, collected by Miss Myrtle Boyle. Santa F^, N. M., seven, as follows :—(l) Ckll 1141, the only male I have, unfortunately witliout its head, on alfalfa, Andrews orchard, June 27 ; (2) Ckll. 3468, on Lmum Lewisii in garden, July 12 ; (3) Ckll. 1407, July 10, Boyle coll; (4) CklL 4242, Aug. 5; (5) Ckll. 4055, Aug. 2, on Clematis ligusficifolia; (6) Ckll. 4044 and 4046, Aug. 2, on Solidago canadensis. Las Cruces, N. M., March 31, 1896, on Sisi/mbriam. This is a species of the transition-zone, thougli a single specimen was taken at Las Cruces, in the Upper Sonoran. Ordinarily it is known especially by the dark nervures and stigma, not at all metallic abdomen, and contrasting colour of the clypeus and supraclypeal area. The stigma may be slightly pallid, a sort of rather dilute sepia, but never honey-yellow; in one example only, apparently conspecific (Wooton's no. 49), did the character of the clypeal coloration fail. H. rmdosensts is very similar to //. Ashmeadii, Rob., from Florida, but the latter will at once be distinguished by the narrower face and the lively reddish-brown colour of the tegul^e; the second submarginal cell in Ashmeadii is much narrowed above, but in ruidosensis it is very little narrowed. Mesilla, New Mexico, U.S.A., May 9, 1897. Xin. — Revision of the Fierine Batterjiies of the Genus Delias. By A. G. Butler, Ph.D. &c.. Senior Assistant-Keeper, Zoological Department, British Museum. As recently as 1893 Bitter von Mitis essayed a revision of this genus in the German ' Iris,' pp. 100-153 ; he, however, overlooked two or three described forms, and his material evidently was far from rich enough to enable him to form a
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