118 BULLETIN 48, UNITED STATES NATIONAL MUSEUM. 



color of the secondaries. Primaries in the male almost evenly pearl 

 to tawn gray, the maculation never distinct, often scarcely traceable • 

 111 the female the base is a pale grayish luteous more or less marked 

 with brown, and black powdered to the transverse posterior line 

 beyond which is a blnish gray shade which darkens to brown or smoky 

 before the subterminal line, continning to the outer margin. The apex 

 IS pale, sharply limited interiorly by a slightly darker tint of the 

 darker wing shade. The usual transverse striga. are marked on the 

 costal space only. Transverse anterior line slightly paler, broad, 

 diftuse, often barely traceable, outwardly bent, and with two stronoly 

 uiarked teeth, as in H. mlifornica. Transverse posterior line usually 

 marked only by the difference in shade between the median and sub- 

 terminal spaces; sometimes, however, emphasized by a slight reddish 

 suttusion. It is nearly rigidly oblique to the submedian' inters])ace 

 where it forms an inward tooth on the internal vein. Subterminal line 

 usually continuous, pale, sometimes preceded by black dots, often 

 obsolete or marked only with black dots in the male. A more or less 

 obvious broken terminal line, preceded by paler scales in the inter- 

 spaces. Ordinary spots marked by elevated scales, which are'-ray 

 outwardly and black centered. A little tuft of elevated scales in" the 

 median space below the cell, and another on the median vein close to 

 base-tins latter being more or less evident in all the species. Second- 

 aries a dirty pale yellowish gray, with a more or less marked brown 

 marginal line. Beneath, a dirty gray, powdery, with a rather broad 

 extra median line on all wings, an incomplete subterminal line on 

 primaries, and a discal lunule on secondaries. 



Expanse of wings, 24 to 2!) mm.=0.06 to I.IG inches. 

 Habitat.—Los Angeles, Cal., April, Julv, October. 

 Nine specimens are before me, all of them from the United States 

 National Museum collection, marked " Through C. V. Riley • " some col 

 lected by Mr. Coquillett, others by Mr. Koebele. Of the 'latter two 

 uear a red number 194, indicating biological notes in the possession of 

 Dr. liiley. 



This species has been confused with H. cuUfornica, with which it 

 agrees in most characters. It is, however, decidedly smaller in the 

 average expanse, and the wings have a modest gray shade, in decided 

 contrast to the distinct bright yellow of its ally, while the ornamenta- 

 tion IS never so contrasting. The character of the transverse posterior 

 liue IS further distinctive, and so are the proportionate! v Ion go,' palpi 

 and more evidently produced angulation of the outer margin ^ 



It IS a somewhat interesting fact that on the Pacific Coast" there should 

 be four species of Hijpena, only one of whi<',h extends to the Atlantic 

 Coast, while on the other hand the species of BomoJocha are numerous 

 in the I^ast, while none are peculiar to the Pacific Coast. 



