March, 1904.] DyAR : NeW NoRTH AMERICAN LePIDOPTERA. 39 



Class I, HEX APOD A. 

 Order V, LEPIDOPTERA. 



NEW SPECIES OF NORTH AMERICAN LEPIDOP- 

 TERA AND A NEW LIMACODID LARVA. 



By Harrison G. Dyar, A.M., Ph.D., 

 Washington, D. C. 



Family NYMPHALIDyE. 



Brenthis andersoni, new species. 



Light fulvous above with very little basal dark shading, the ordinary black 

 markings small, well separated. Below, fore wings fulvous at base with small black 

 spots, apex yellowish, stained irregularly with rusty brown. Hind wings rusty brown ; 

 discal spot small, round, black, distinct. In the base of the interspace of veins lb 

 and 2 is a triangular silvery white spot ; another in the end of the cell continued over 

 the cross- vein more than its own length in the cell, its tip rounded ; a row of mar- 

 ginal silver spots between the veins. A few small yellow spots in the basal red area ; 

 median row of spots well defined, yellow, excised between the veins on both ends, 

 edged indistinctly by blackish and only narrowly separated by the veins ; outer area 

 irregularly diluted with yellow, the largest illy defined patch over vein 4 ; submarginal 

 spots brown, annular, not well defined; a roV of brownish cusps within the silvery 

 marginal spots. Expanse 43 mm. 



One male, labelled Kootenay, B. C, from Mr. E. M. Anderson, 

 who originally had three. 



Type. — No. 7735, U. S. National Museum. 



The species falls between myrina and astarte (Proc. ent. soc. 

 Wash., V, 130, 1903), but is abundantly distinct from either. 



Family LYC^NID^. 

 Thecla critola Hewitson. 



Mr. Oslar has sent me a pair which he took in the Patagonia 

 Mountains, Arizona, May 21. The sexes are remarkably dissimilar 

 above. 



The ^ is a deep shining blue, the costa and outer margin of fore wings and the 

 apex more broadly black, with a large, diffuse discal patch also black. This is simply 

 a black spot, not a sex mark, its scales being unmodified. The hind wings are 

 solidly light blue, except a very narrow edge. Two tails, the outer shorter ; anal 

 angle with two slight rounded prominences, preceded by a narrow white line. The 

 9 is gray, the inner part of fore wings and most of hind wings washed with bluish 

 gray. A blackish spot lies on the outer margin of hind wings between the tails and 



