164 PROCEEDINGS OF THE ACADEMY OF 



dark brown. Along the costa are a few dark brown spots and a few in the 

 apical portion behind the ochreous band. Hind wings dark brown. 



Size small. Fore wings acutely pointed or lanceolate. Hind wings deeply 

 emarginate beneath the tip, which is produced. Labial palpi rather short ; middle 

 joint somewhat thickened with scales, terminal rather short. 



G.? deter sell a. Head and face grayish fuscous. Labial palpi pale 

 yellowish-white, with two fuscous patches on the middle joint, a very narrow 

 fuscous ring at the base of terminal joint, a broad one near the tip, with the 

 extreme apex whitish. Antennae grayish fuscous, annulated with dark fus- 

 cous. Fore wings grayish, very profusely dusted with dark fuscous, with a 

 dark fuscous spot on the disk ; cilia ochreous gray. Hind wings pale ochreous- 

 gray ; cilia pale ochreous. Feet annulated with whitish. 



I have found this genus a very difficult one. It is of great extent and in- 

 cludes individuals of a variety of aspects and more or less marked modifica- 

 tions in the labial palpi. The oral parts in the doubtful species correspond 

 so nearly to those of the genus, that I have concluded after much hesitation 

 not to place them in separate groups, notwithstanding the produced apex of 

 the hind wings in some of them. 



Strobisia. 



Fore wings obtuse and rounded behind. The subcostal divides into four 

 branches, with the apical branch simple or forked. The discoidal nervure 

 gives origin to a disco-central branch. The median is four-branched ; sub- 

 median forked at the base. Hind wings trapezoidal, not broader than fore 

 wings, with the hinder margin slightly emarginate beneath the tip. Subcos- 

 tal bifid from the discoidal, which gives rise to a disco-central vein. Median 

 three-branched, the two upper branches aiising at a common base. 



Head smooth with appressed scales. Forehead and face rounded. Ocelli 

 large. Eyes oval and obliquely placed. Labial palpi recurved, moderately 

 long ; second joint flattened, smooth with appressed scales ; third slender, 

 smooth and pointed. Maxillary palpi short and distinct. Antennae slender, 

 simple ; basal joint subclavate. Tongue scaled, nearly or quite as long as the 

 thorax beneath. 



The structure of the insects here included, closely approach that of the 

 genus Gelechia, in which I placed them in the first arrangement. I cannot 

 believe, however, that they are members of this group, and have hence re- 

 moved them. The perfect insects are most commonly found in shaded places, 

 on the surface of leaves. They are active and restless in their motions, and 

 turn in circles on their resting places, especially after short flights ; withal 

 they are disposed to be quarrelsome and drive away from the leaves on which 

 they may happen to be enjoying themselves, other " little people" of the 

 shaded wood. 



Fore wings obtusely rounded behind. Subcosto apical branch simple. Medio 

 posterior vein bifid. 



S. iridipennella . Head and thorax brown, with a greenish hue j 

 face whitish beneath. Labial palpi dull silvery. Antennae dark brown. Fore 

 wings dark brown, with a greenish-golden hue. Along the costa are three 

 metallic blue or violet-blue oblique streaks scarcely reaching the middle of 

 the wing, the first is longest and is placed about the middle of the costa, the 

 third near the tip, and with three spots of the same hue beneath the second 

 streak, one in the fold and two in the middle of the wing. In the apical por- 

 tion near the hind margin are three or four parallel similarly hued streaks 

 and at the base of the fold is a violet-blue spot. Hind wings brown, along 

 the base of costa pale yellow. 



[May, 



