I h;i\i' lalM'ii iliis species in .Mini (';in>iiii, mid ;ilsi> have a k<><><1 

 series frein N'iclorviile. Mojave Deseii, (laJNen in .May (if this year) 

 where it Hies in alinmianee. It is nnduubUully a valid si)ec;ie8, total- 

 ly distinct from acnion, which also occurs in tlie same district. Its 

 flight is more energetic and its liahits very dit't'erent. Tlie male and 

 female may be easily distinguished, as a glance at the accompany- 

 ing plate will determine. I have taken several pairs in copulation. 



It differs markedly from all forms of acmon in several i)articu- 

 lars, chief of which are: 



In tlie male, the blue scales on upper surface are concentrated 

 most heavily in the basal area and gradually give place to the dark 

 marginal shading. The marginal orange band on secondaries of ac- 

 mon is represented only by a brownish or yellow-brown suffusion on 

 which are slight shadowy suggestions of dark spots. The type, speci- 

 men has three such spots suggested, but the majority of the males 

 show only one or two. On the under surface we find the ground 

 color practically alike in the two sexes, whereas in acmon the ground 

 color of the males is lighter. Another striking point of difference is 

 the series of black spots distal to the reniform discal dash. In both 

 sexes of emigdionis these are fully twice the size of the marginal 

 series and are irregularly cuneiform, whereas in acmon they are 

 relatively much smaller, oval In form and more evenly aligned. A 

 clear distinction rests in the five submarginal metallic rings on 

 under side of secondaries which are relatively much larger in emig- 

 dionis than in any form of acmon. The "orange" crescents internal 

 to these are reduced to about i/^ mm. and are not orange but yel- 

 low. The upper surface of female may be separated from acmon by 

 the broad outer yellow-brown suffusion which gradually diminishes 

 in the llmbal area. This suffusion is somewhat more concentrated 

 along the lines of the nervules and gives a slightly "neurated" ef- 

 fect to the wing, which has not been noted in the authors original 

 description, but is clearly present in the types. The figures which 

 I show have been compared with the latter. 



Plebeius neurona, Skinner. Entom. News, .Jan. 1902, Vol. XIII, p. 15. 



This rare and remarkable Lycaenid was first taken by W. G. 

 Wright at Doble, an old Mining Camp in the San Bernardino 

 Mountains. Of late years our local collectors have depended on the 

 summit of Mt. Wilson to supply their specimens but the latter col- 



47 



