Eighth Report of the State Bnto^wlogist. 131 



specially chosen for this purpose, but the fact has been stated by 

 several writers, and the entire covering of the two received by me, 

 consisted of these organs. 



So perfect is the concealment of the caterpillar or its mimicry of a 

 blighted blossom, that it might be supposed that the immunity from 

 its natural enemies which it must secure in this manner would promote 

 its multiplication and make it a quite common insect; but on the other 

 hand, its disguise might easily, before it had attained a conspicuous 

 size, permit of its being swallowed unsuspectingly with the berry. 

 Indeed, a writer has remarked:* "The lovers of these most exquisite 

 fruits, the raspberry and the blackberry, are often greatly disgusted by 

 the discovery of the fact that instead of the delicious berry which 

 they expected to enjoy, they are munching the small caterpillar under 

 consideration." 



The Caterpillar Described. 



The caterpillar has been described by Professor Riley as follows : 



Average length, 0.80 inch. Color light yellowish-gray, darker just 

 behind each joint, and very minutely shagreened all over. On each 

 segment a prominent pointed straight projection on each side of the 

 dorsum, and several minor warts and prickles below. Two very 

 slightly raised longitudinal lighter lines along the dorsum between the 

 prominent prickles. Ten legs. 



The above description, although brief, is probably all that will be 

 needed for its identification, in consideration of its peculiar appearance 

 and habits above given and illustrated. 



The Moth. 

 The moth is a delicate creature, of about a half inch expanse of 

 wings, of a pale green color, having both pairs of wings traversed by 

 two whitish cross bands. More minutely described, to distinguish it 

 from allied species: 



Pea-green; a white stripe between the antenna?, which are also white, 

 and beneath pale testaceous; palpi and legs white; front and pectus 

 green; a green stripe on the fore trochanters. Palpi very long, 

 extending out nearly twice the length of the head, greenish or reddish 

 at the tip. Fore- wings with, the costal edge white; a basal curved line, 

 slightly dentate on the venules. Discal dot very linear, pale, obscure. 

 Outer white line parallel with the outer edge, dentate on the venules; 

 edge with white dots on the venules; fringe pale green. Secondaries 

 with a much curved basal white line, a linear, small, white discal dot; 

 outer line very dentate on the venules, much more so than the same line 

 on fore wings; fringe pale, edge with white dots on ends of venules. 

 Beneath, fore-wings testaceous, whitish on costal edge; fringe white; 



* Ist Report on the Insects of Missouri, 1869, p. 139. 



