105 



a. Femora of the prothoracic legs exposed. 



b. Wings pointed, extending on to the sixth abdominal segment; 

 proximal end of each antenna elevated and roughened with trans- 

 verse ridges ; cremaster present Psilocorsis Clemens. 



bb. Wings not pointed, and never extending beyond the caudal mar- 

 gin of the fourth abdominal segment ; proximal end of each an- 

 tenna never elevated or roughened with transverse ridges; cre- 

 master never present Depressaria Haworth. 



aa. Prothoracic femora never exposed Agonopteryx Hiibner. 



The following species were examined : 

 Psilocorsis obsoletella Zeller, quercicella Clemens 

 Depressaria heracliana De Geer 

 Agonopteryx nebulosa Zeller 



Family Stenomidae 



The Stenomidae include most of the genera formerly grouped 

 under the name of Xylorictidae. The appendages are arranged as in 

 the Gelechiidae and the maxillary palpi are minute (Fig. 96). A 

 small portion of the labial palpi is usually apparent. The appendages 

 are firmly soldered to each other and to the body wall. They extend 

 slightly beyond the caudal margin of the fourth abdominal segment, so 

 that there are three free segments, the fourth, fifth, and sixth. The 

 margins of these free segments are serrate along the edges of the in- 

 cisions, which are very deep, especially on the ventral surface, and per- 

 mit the caudal end of the body to be very sharply curved ventrad, 

 reaching almost to the caudal margin of the wings (Fig. 96a). The 

 fronto-clypeal suture is visible for a short distance mesad of the prox- 

 imal end of each antenna, but it never reaches the meson. There are 

 many curved setae present on the ventral surface of the ninth abdom- 

 inal segment. The body is always more or less depressed, and in 

 Stenoma is about 8 mm. in length, in Menesta 3 mm. The genus 

 Menesta, formerly included in the Gelechiidae, seems more closely 

 allied to Stenoma and is included here. Stenoma possesses peculiarly 

 modified setae on the body surface. These genera may be separated as 

 follows : 



a. Antennae modified at their proximal ends, forming an enlarged cor- 

 rugated area ; hooked setae on the ventral part of the ninth abdom- 

 inal segment never on a distinct prolongation Stenoma Zeller. 



aa. Antennae never modified at the proximal end ; hooked setae on the 

 ventral part of the ninth abdominal segment on a distinct prolon- 

 gation Menesta Clemens. 



