184 



fed, in a slight cocoon. It is 5 mm. in length, greenish, wing- 

 cases bright green, extending to apex of fourth abdominal seg- 

 ment; abdominal segment?, except tirst, with two transverse dor- 

 sal rows of minute spines, the basal row on segments 3 to 8 

 laro-er; cremaster with a few hooked bristles fastened into the 

 silk of cocoon. 



A parasite larva {Sierola sp.) was found feeding on one of 

 the moth larvae. It was feeding externally, and was about 2.5 

 mm. long, plump, greenish with white spots all over — perhaps 

 the fat-bodies showing through. This larva spim a silken 

 cocoon, from which the adult parasite emerged in 12 days. 



Bedellta oplismexiella n. sp. 



Male, female. 7-8 mm. Antennae whitish, with dark, fuscous an- 

 nulations; palpi, head and thorax pale fawn, sprinkled with fuscous, 

 often a few white scales at back of head. Forewings pale fawn, un- 

 evenly sprinkled with dark, fuscous scales, most numerous along 

 outer two-thirds of costa and sometimes one or two discal dots, and 

 sometimes along middle of dorsum; cilia pale gray, sprinkled with 

 fuscous at apex. Hindwings and cilia pale gray. Abdomen pale gray, 

 sprinkled with fuscous beneath. Legs brownish fuscous, tarsi with 

 pale annulations. 



Very close to the species of BedelUa mining the leaves of 

 various species of Ipomoea, concerning whose identity there is 

 some uncertainty, Walsingham in The Fauna Hawaiiensis 

 (1907) having determined it as B. minor Busck, while Busck 

 has more recently determined it as B. orchilella Walsm. I 

 cannot with certainty separate specimens of my species from 

 the I'pomuea one ; but, as my specimens are all bred from a grass, 

 I have considered it a different species, particularly as the 

 pupae have several differences. The pupa of the Ipomoea 

 species has an elevated median dorsal ridge on the thorax, a 

 median dorsal ridge on the abdomen, and the wing-sheaths are 

 roughened with minute points; while in oplismeniella, the tho- 

 rax has a low median dorsal ridge, median dorsal ridge lacking 

 on the abdomen, and the wing-sheaths are not roughened with 

 minute points. 



Described from numerous bred specimens. I first noticed 

 this species mining the leaves of a grass (OpUsmenus coniposi- 

 tus) along the Castle Trail on the Pauoa side of Mt. Tantalus, 

 August 8, 1900. Since then I have found it wherever I have ex- 

 amined this grass in the mountains of Oahu, and also on Hawaii. 



