Vol. XXvii] ENTOMOLOGICAL NEWS. 83 



tends to the costa, so that the configuration of the basal part 

 of the wing is essentially that of L. arbutusclla, unmarked how- 

 ever by the line of dark scales which limits the outer margin 

 of the costal portion of the white area in that species. Such 

 specimens always lack the apical spot and some of the dark 

 margins. 



Lithocolletis leucothorax Wlsm. 



Mines of this species were collected August 8, 1915, on the 

 lower side of leaves of scrub tan oak, Qncrciis dcnsiflora var. 

 echinoides Sargent, growing at Rocky Point, Upper Klamath 

 Lake, Oregon. The larva consumes the entire leaf substance 

 within the mine and at maturity throws the* lower epidermis 

 into several folds between which are numerous fine wrinkles. 

 The pupa is suspended by a few silken threads. 



Lithocolletis diversella n. sp. 



I recently reared two specimens of an undescribed species 

 of Lithocolletis: One was a miner on huckleberry, Gaylns- 

 sacia baccata (Wang.) C. Koch and the imago appeared Au- 

 gust 31, 1914; the other a miner on sorrel tree, Oxydcndrum ar- 

 boreum (L.) DC., and the imago appeared May 10 of the fol- 

 lowing year. Both were collected in the "Sugar Grove Re- 

 gion" near Lancaster, Fairfield County, Ohio. 



While the two specimens are identical as regards the con- 

 figuration of the color markings, there is a very striking dif- 

 ference in the degree of specialization of the scales, and the 

 resulting brilliancy of markings ; the metallic luster is found 

 in the specimen from the overwintering pupa only (which is 

 a female). The more brilliant specimen is regarded as the 

 type ; absence of the specialized characters in the other speci- 

 men (a male) is noted in the description of the species which 

 follows : 



Palpi whitish, face metallic golden, tuft dark brown; antennae dark 

 gray, with the eight or nine segments preceding the apex whitish; ter- 

 minal segment dark. (In the other specimen the tuft is reddish ocher- 

 ous ; antennae pale gray throughout.) 



Thorax deep metallic golden, this color extending onto the extreme 

 base of the fore-wings, which elsewhere are golden or reddish brown, 

 luit not metallic. The coloring is identical with that of L. ostensack- 

 cncUn. (In the other specimen, the scales of the thorax and fore-wings 

 are identical in structure ; the color is a little paler and more ocherous.) 

 The markings of the fore-wings, which are lustrous white in one speci- 

 men, scarcely shining in the other, are placed as follows: A very short 

 basal streak just nhove the fold, margined with dark brown toward the 

 costa; an almost straight fascia at one-third dark margined intern, ill\ 

 two posterior costal and two dorsal spots, internally margined : the first 



