1918] CrambincB of North America 59 



Genitalia. Female — Anal valve (Fig S) broad, nearly square in 

 outline, not constricted at the base, dorsal angle rounded and slightly 

 produced. Male — All parts uniformly and moderately chitinized; 

 body of scaphium (Fig. 6) narrow, slightly longer than the limbs, which 

 are narrow and rounded distad; uncus slender, elongate, slightly enlarged 

 distad and ending in a small but distinct sharp hook, hirsute above, 

 lower limb very slender, exceeding the uncus, its branches very short, 

 naked; clasps (Fig. 10) strongly concave at the base, valve slender, 

 elongate, uniformly clothed on the inner surface with fine hair and 

 at its base a heavily spined, rounded lobe; harpe a long, strong, S-shapcd, 

 naked spine, exceeding the valve; penis (Fig. 9) moderately chitinized, 

 bulbous at base and tapering to an obliquely truncate, curved tip, 

 hollow, open at the end, with a slender, chitinous internal spine more 

 than half the length of the organ extending nearly to the tip, the whole 

 organ subtended by a weakly chitinized plate attached about the 

 middle. 



Our specimens agree exactly with the descriptions of Zeller 

 and Fernald except that in some individuals the terminal line 

 is somewhat more distinct than they indicate and the forewings 

 of our specimens do not have the acute apex with the slight 

 curve beneath that Zeller mentions. 



The larva, especially in the later instars is easily distin- 

 guished from other Crambin larvae we have seen by its color, a 

 bright brick-red arranged in longitudinal stripes separated by 

 irregular broken white lines. The head, black in the newly 

 hatched larva, becomes in the larger instars a clear pale yellow, 

 in some individuals faintly clouded with darker yellow^ Tech- 

 nical descriptions of the egg, larval and pupal stages follo\v. 

 Terms as defined and used by Fracker for the larva and Miss 

 Mosher for the pupa are used. Larval measurements are con- 

 densed in Table II and are therefore omitted from the 

 descriptions. 



Egg. Elongate oval, bluntly rounded at both ends one of which 

 is slightly smaller than the other; chorion with 17 acute longitudinal 

 ribs, 5 or (5 of them running to the pole at each end, the others appearing 

 as the interspaces widen; interspaces faintly transversely striate through- 

 out their length. Measurements (10 eggs): 



Length, maximum .529 mm., minimum .460 mm., average .496 mm. 



Width, maximum .318 mm., minimum .300 mm., average .307 mm. 



The eggs are pure white when laid, when a few hours assume 

 a yellowish tinge and at the end of three or four days become 

 pale salmon-yellow, remaining thus until about twenty-four 



