Genus Basilarchia 



(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 submar- 

 ginal 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 cater- 

 pillar feeds upon cottonwood (Populus). 



The insect is found on the Pacific slope and eastward to Mon- 

 tana, 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 remark- 

 able manner, as may be seen by referring to Plate VII. An aber- 

 ration 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 numer- 

 ous writers. The egg is depicted on p. 3, Fig. i. 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 re- 

 lieved 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). 



Butterfly. Easily distinguished from all the other species of 

 the genus by the yellowish-white bar near the end of the cell of 



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