184 ENTOMOLOGICAL SOCIETY 



Head rounded, apex under joint 2, a little flattened, cljpeus highly tri 

 angular, narrow, just touching the vertical triangle, a little depressed; lu- 

 teous, mouth brown, ocelli black. Body cylindrical, not tapering, incis- 

 ures not deep, translucent, faintly yellowish. Thoracic feet short; ab 

 dominal ones sessile, on joints 7 to 9 and 13. Setae pale, obscure; tuber 

 cles obsolete. On maturing the larvae turn bright red and leave the mine 

 to spin their cocoons. 



Gracilaria burserella Busck. The larva lives on Bursera 

 gummifera. At first it forms a mine starting next the midrib or 

 large vein, broadly linear, finally widening into a subquadrate 

 blotch bounded by the veins. The lower epidermis is thin ; no 

 sign of the mine above. Later the larva leaves this mine by a 

 hole and folds over a part of the leaf near the petiole at the mar 

 gin fastened with white webby stitches without. It lives con 

 cealed in this and eats out the epidermis and parenchyma. Forms 

 a white cocoon on the back of the leaf. 



Head bilobed, full, clypeus highly triangular, touching the small vertical 

 triangle; shining, ocelli, black; mouth pointed; colorless. Body cylin 

 drical, the feet large; abdominal ones on joints 7 to 9 and 13, large and 

 distinct, none on joint 10. Segments equal, 12 and 13 a little smaller; 

 segments with distinct incisures, 2-annulate. Whitish translucent, shields 

 concolorous. Setae rather long, pale; i dorsad to ii, iv and v in line 

 quite remote, vi long, vii on leg base; on thorax ia + ib, Ha -f- iib. Cer 

 vical shield large, semicircular; anal plate small. 



Gracilaria sebastianiella Busck. The larva forms a mine on 

 the. back of a leaf of Sebestiania lucida, an irregular band- 

 shaped mine with lobes in different directions, finally forming 

 a large blotch with a long fold in the thin lower epidermis, 

 sewed up with white silk. Below this the larva eats the thick 

 upper side to the upper epidermis near one edge of the blotch. 



Head round, the lobes full, clypeus triangular, high ; brownish, ocelli 

 black, mouth brown. Body nearly cylindrical, incisures well marked but 

 not moniliform, not strongly tapering. Thoracic feet large, normal ; 

 abdominal ones strong and short, on joints 7 to 9 and 13. All colorless, 

 whitish, food dark green, plainly showing. Setae and tubercles obsoles 

 cent. Later the larva came out and folded up the whole end of a leaf into a 

 neat triangular box and ate out the parenchyma. The box was held with 

 bands of silk without and the edges sewed up; frass contained. 



The larva comes out a small hole at the end and spins a cocoon 

 in a similarly folded leaf, but a fresh one, with a hole at the 

 corner for the emergence of the moth. 



Gracilaria sp. A specimen at light. 



Phyllocnistis intermediella Busck. The larva mines the 

 leaves of Sideroxylon pattidum as described by Busck. Head 



