OAK-BORERS. 59 



Fitcli thinks it probable tliat it bores into the oak. He describes it as 

 a moth smaller iu size thau P. robinice, with thin and slight transparent 

 wings, which are crossed by numerous black lines, the outer margin only 

 of the forward pair being opaque and of a gray color; the hind wings 

 of the male are colorless, with the inner margin broadly blackish and 

 the hind edge coal-black. 



Mr. Lintner has found the IdTva burrowing in the black oak. The moth 

 appeared April 29th. The male is about half as large as the female. 



"This species is smaller than rQhinice, the female expanding 46™"" or 

 47™"°, the male about 10"™ less. The male hind wings seem translucent, 

 but on holding them obliquely in certain lights the yellow tint may be 

 seen plainly. This smaller and rarer species occurs also in Texas. It 

 is freer from reticulations and more transparent thau any other form." 

 <Bailey, Bull. No. 3, Div. Ent., Dept. Ag., 55.) 



Larva. — Length an inch and a half. Pale green, with a darker green dorsal stripe, 

 bordered faintly with yellow. Head flat, subtriangular, dark brown clouded with 

 black. First segment with two brown spots extending across it, narrowed laterally, 

 and of nearly the length of the segment medially, where they unite to inclose on the 

 dorsal line an elongate-elliptical green spot. The anterior segments are flattened, 

 and broader than the following, which gradually diminish in breadth toward the 

 posterior end. The segments are marked dorsally with four rose-colored elevated 

 points, the trapezoidal spots of Guende; on the 10th and 11th segments they form a 

 quare. A similar spot is present above each stigma, a smaller one below, and an- 

 other in front — each of these bearing a short brown hair. The stigmata are oval, 

 orange-colored, centered with dark brown. The legs are tipped with chestnut brown, 

 and the prolegs armed with brown plantae. — (Lintner, Ent. Contributions, iv, 135.) 



5. Cosaula magnifica Bailey. 

 (PI. 11, figs. 1-3.) 



An account of this fine moth and its transformations is published in 

 Papilio (ii, 93) by Dr. J. S. Bailey. The larvse were found by Mr. 

 Koebele boring in species of oak and hickory near Tallahassee, Fla. 

 A single live-oak was observed standing in an open field containing 

 many larvte, their debris, resembling saw-dust, being distributed over 

 the ground around the roots of the tree more than six inches in depth. 

 "At the period of pupation the larvae, as is customary with the Cossidae, 

 takes its position near the surface of the bark. The tunneling is usu- 

 ally conducted near the surface, from one-quarter to one inch beneath 

 the bark. After the imagines emerge their pupa cases are left protrud- 

 ing through the bark." 



Pupa. — The long testaceous pupa-case is provided with an irregular series of five 

 tuberculatious on each side ©f the anus. (Bailey.) 



Moth. — Size small ; male antennie bipectinate to the tips, the inner series one-third 

 the length of the outer pectinations; hind tibii© pilose; wings broad, the front pair 

 rounded at the apices, costa with dark dots; fuscous gray, smooth, with indistinct 

 fragmentary reticulations. A light brown patch covers the outer edge ; before the 

 patch is a light gray subterminal shade. Hind wings blackish brown ; front yellow- 

 ish; thorax light gray; abdomen dark gray; expanse of wings, 36™". (1.44 inches). 

 ■(Bailey.) 



