4 INSECUTOR INSCITl/E MENSTRUUS 



upon the cambium ; the mine is a slender serpentine, a few millimeters 

 broad and several inches long, often doubling upon itself and broadening 

 out to twice or more in width in early spring, when the larva reaches 

 maturity ; in April and early May the full-grown larva leaves the bark 

 and falls to the ground, where it makes a closely woven, reddish brown 

 cocoon among the rubbish, often boring down a few inches in the loose 

 surface soil to find a suitable moist place on the underside of an old leaf 

 or twig. The cocoon is oval, flattened, about 2 by 3 millimeters in diam- 

 eter and H millimeters thick. 



The imagos, which were reared at the Falls Church, Virginia, Forest 

 Insect Station by Messrs. T. E. Snyder, Carl Heinrich, and the writer, 

 issued from September 7 to September 25. 



The larva is typical of the genus, without true legs or prolegs, but with 

 traces of rudimentary prolegs on second and third thoracic segments and 

 on all the abdominal segments except the two penultimate segments ; 

 none of these slight processes has any hooks ; when full grown it is white 

 with brown mouth parts ; on first thoracic segment are two dorsal, brown, 

 chitinized lines indicating the outer edges of a thoracic plate and one 

 broad, rectangular, brown sternal plate ; on the last abdominal segment 

 are two diverging, brown, chitinized lines on the upper side indicating the 

 outer edges of an anal plate ; two similar chitinized ventraJ lines and two 

 conspicuous brown apodemes, starting, one on each side, from edge of 

 the anus. 



FOUR NEW LEPIDOPTERA FROM BRITISH 

 GUIANA 



By HARRISON G. DYAR 

 HESPERIID/E 

 Lerema mooreana, new species. 



Blackish brown ; head with dull ochreous hairs, the fringe of the wings 

 light. Male stigma oblique, dull black ; three minute costo-subapical dots 

 and one above vein 3. Female with the dots larger, a quadrate spot 

 above vein 2 and a smaller one above vein I , white but not hyaline. 

 Below washed with dull ochreous, disk of fore wing black ; spots repeated, 

 the hind wing with a row of five faint pale spots between the veins near 

 the middle, oblique, the upper spot retracted. Expanse, male, 28 mm. ; 

 female, 30 mm. 



