18 BULLETIN 190, UNITED STATES NATIONAL MUSEUM 



the larval gallery without the construction of a cocoon, permitting move- 

 ment clown to the root or up into the stem to a prepared exit hole, thinly 

 covered by the outer plant skin. Liberal accumulations of small, pale 

 pellets around the bases of plants serve to indicate the presence of feeding 

 larvae. In breeding cages, most likely because of disturbances, the larva 

 is apt to construct a soft tube of silk and sand grains extruding an inch, 

 more or less, above the exit hole ; this apparently does not occur under 

 normal conditions out of doors. The species is annual. 



The holotype and allotype specimens are labeled Mill Creek, San Bernar- 

 dino County, Calif., August 28 and September 2, 1938 (C. Henne). Since 

 the food plant and the habits are known, a larger representation of the 

 species can be expected before long. 



PENSTEMONIA CLARKEI, new species 



Plate 17, Figures 93, 94 



Sexes similar. 



Male. — Antennae black. Labial palpus yellow, on upper half of second 

 and third joint sparsely mixed with black. Head black, face glossy 

 yellow. Collar bright yellow, slightly mixed with black at the sides. 

 Thorax violaceous-black, patagia narrowly edged with yellow on the inner 

 sides and a yellow mark in front and beneath the base of forewing. Abdo- 

 men violaceous-black, segment 1 narrowly and segment 2 broadly edged 

 with yellow, segments 4, 6, and 7 wholly yellow ; underside of all seg- 

 ments yellow, except 3, which is black ; anal tuft narrowly fan-shaped, 

 black with yellow center, beneath yellow, thinly streaked with black. 

 Femora of forelegs bright yellow ; femora of hindlegs lustrous black ; 

 tibiae yellow, black between the spurs ; tarsi yellow, slightly mixed with 

 black on posterior joints. Forewing with costa, outer margin, veins, and 

 large, square discal mark black ; between the veins heavily washed with 

 dull-yellow scales, leaving only small, more or less suffused, transparent 

 areas before and behind the discal mark. Hindwing transparent, narrowly 

 margined with black, fringes dull black ; beneath the yellow suffusions 

 heavier than above. 



Female. — Like the male but body stouter. Abdomen broadly banded 

 with bright yellow on segments 1, 2, 4, and 6 above and beneath on all 

 segments, except segment 3, which is marked with yellow at the sides only. 

 The short, blunt anal tuft black, with two yellow streaks in the middle. 



Expanse : Male 20 to 22 mm., female 22 mm. 



Distribution.— FsLcific Coast States, intermountain regions, California, 

 Oregon, Washington. 



Type.— U.S.N. M. No. 56823. Collected at The Dalles, Oreg. Holotype 

 male, allotype female, and 1 2 paratypes. 



Remarks. — Named for J. F. Gates Clarke, well-known lepidopterist of 

 the United States Bureau of Entomology and Plant Quarantine, who 



