STJPERFAMILY GELECHOIDEA 167 



rado are described by Busck (1901 and 1903). His descrip- 

 tion of the larva of N. pisoniae from Palm Beach, Florida, 

 is as follows: 



The larva is, when full grown, cylindrical, somewhat flattened, 

 strongly segmented, and tapering backward, about 7 mm. long. 

 It has three pairs of normal thoracic feet, four pairs of abdominal 

 feet suggesting the toes of a tree frog, being very long and thin 

 with a globular swelling at the end; while in the mine they are 

 pointed backward, flat to the body; no anal legs. Larva is white 

 with light-brown head and thoracic plate; sutures in head darker 

 brown. When mature it cuts its way out of the mine and spins 

 nearby on the leaf a tough, oval, flat, white cocoon, from which 

 the pupa does not protrude, when imago issues. 



LAVERNIDAE 



This is another family of minute moths in which the 

 larvae commonly feed from shelters of some sort and a 

 considerable portion of which are leaf-miners. Our repre- 

 sentatives of the three following genera are all leaf-miners. 



Psacophora 



The larvae are rather generalized tissue feeders, somewhat 

 depressed in form and with rather deep incisions between 

 the body segments. Thoracic legs are well developed but 

 prolegs are very small. They feed entirely within the mine 

 but pupate outside. The work of P. argentimaculella was 

 described by Miss Murtfeldt (1900) as follows: 



Mines leaves of Oenothera biennis. The mine begins in a wind- 

 ing tract, which crosses back and forth, often becoming confluent. 

 The dark, granular frass forms a rather definite line through the 

 middle. 



When ready to transform, the larva deserts the mine and in- 

 closes itself in a dense, oval, white silk cocoon formed against the 

 midrib or in a wrinkle of the leaf. Pupa dark brown. Imago 

 appears in nine or ten days. 



