+--------------------------------------------------------------+ | | | EXPLANATION OF PLATE XXII | | | | 1. _Basilarchia astyanax_, Fabricius, ♂. | | 2. _Heterochroa californica_, Butler, ♀. | | 3. _Basilarchia lorquini_, Boisduval, ♂. | | 4. _Basilarchia arthemis_, Drury, ♂. | | 5. _Basilarchia arthemis_, Drury, var. | | _proserpina_, Edwards, ♂. | | 6. _Basilarchia weidemeyeri_, Edwards, ♂. | | | | [Illustration PLATE XXII.] | +--------------------------------------------------------------+ (3) =Basilarchia weidemeyeri=, Edwards, Plate XXII, Fig. 6, ♂ (Weidemeyer's Admiral). _Butterfly._--Superficially like _arthemis_, but easily distinguished by the absence of the lunulate marginal bands of blue on the margins of the hind wings and by the presence of a submarginal series of white spots on both wings. Expanse, 3.00 inches. _Early Stages._--These have been described by W.H. Edwards in the "Canadian Entomologist," vol. xxiv, p. 107, and show great likeness to the following species, _B. disippus_. The caterpillar feeds upon cottonwood (_Populus_). The insect is found on the Pacific slope and eastward to Montana, Nebraska, and New Mexico. (4) =Basilarchia disippus=, Godart, Plate VII, Fig. 4, ♂; Plate III, Figs. 19, 22, 24, _larva_; Plate IV, Figs. 18-20, _chrysalis_ (The Viceroy). _Butterfly._--This species mimics _Anosia plexippus_ in a remarkable manner, as may be seen by referring to Plate VII. An aberration in which the mesial dark transverse band on the secondaries has disappeared was named _pseudodorippus_ by Dr. Strecker. The type is in the Mead collection, now belonging to the writer. Expanse, 2.50-2.75 inches. _Early Stages._--These have all been carefully studied by numerous writers. The egg is depicted on p. 3, Fig. 1. The caterpillar is shown on p. 8, as well as in Plate III. The species ranges everywhere from southern Canada and British America into the Gulf States. (5) =Basilarchia hulsti=, Edwards, Plate VII, Fig. 5, ♂ (Hulst's Admiral). _Butterfly._--This form is apparently a mimic of _Anosia berenice_. The ground-color of the wings is not so bright as in _B. disippus_, and the mesial band of the secondaries on the upper side is relieved by a series of small whitish spots, one on each interspace. The perfect insect can easily be distinguished by its markings. Expanse, 2.50-2.60 inches. Thus far it is only known from Utah and Arizona. The early stages have not been described. (6) =Basilarchia lorquini=, Boisduval, Plate XXII, Fig. 3, ♂ (Lorquin's Admiral).