118 



one or more of them may turn out to be synonyms, but no reliable evi- 

 dence to this effect is to be gathered from the often too meager descrip- 

 tions. For this reason I am unable at present to suggest any new- 

 synonymy. 



The Revised Index will stand at present approximately as in Cham- 

 bers' edition, with the addition of the flv^e subsequently recorded species, 

 including the four here mentioned, the fifth being described in the 

 Transactions of the American Entomological Society, X, 173 (1882), as 

 subreticulata Wlsm. 



Argyresthia mendica Hw. 



A specimen submitted to me for examination by Dr. Eiley in July, 

 1886, appears to be not separable from mendica Hw. from the European 

 form of which it differs, perhaps, in having the white portions of the 

 wing somewhat less conspicuous, especially the costal dots. 



Argyresthia cupressella sp. n. 



Antennas, basal joint clothed with white hair-scales ; stem distinctly annulated with 

 black and white. 



Palpi, short, depressed, ochreous. 



Head, white. 



Thorax, shining golden-brown. 



Fore-xoings, shining, mottled with golden-brown and creamy-white, the latter appear- 

 ing in a broad, inwardly-oblique spot near the baseof the dorsal margin, followed 

 by a smaller costal spot at one-fourth from the base, and in an oblique and some- 

 what waved central fascia, wider and nearer to the base on the dorsal than on 

 the costal margin, below which it is slightly bent outwards, followed by two 

 costal and one dorsal spot of the same color ; the first of the two costal spots is 

 smaller than the second, and reaches almost, or quite, to the anal angle of the 

 fascia, sometimes forming a separate costal fork of the fascia itself. About the 

 apex are three or four small spots of a similar color, followed by a few black 

 scales at the extreme tip ; cilia, pale golden. Underside, steely-gray, with an 

 aureous tinge about the cilia. 



Hind-wings, pale grayish, with a slight ochreous tinge in the cilia. 



Abdomen, grayish, aual tuft ochreous. 



Legs, whitish, tarsal joints faintly indicated above by slightly darker spots. 



Exp. al, 8™«i. 



JLarva, on cypress, the perfect insect appears in April. 



Hah., Los Angeles (California). 



The description is taken from a good specimen received with three oth. 

 ers from Dr. Riley, to whom they had been submitted by Mr. D. W. 

 Coquillett; both sexes were represented. The markings have evidently 

 much tendency to blend into each other so that the exact position of 

 the pale spots is not always clearly defined and would be scarcely trace- 

 able in a worn specimen. This species is allied to the European ab- 

 dominalis Z., from which its darker coloring and more checkered pat- 

 tern at once distinguish it. 



