110 - SIXTH ANNUAL REPORT 



from depositing her eggs, is not known: judging from analogy, proba- 

 bly not. Yet it will tend to keep the bark smoother, and, in being 

 used to shield the tree from the other borer, it will indirectly shield it 

 from this one. Mr. Gennadius recommends whitewashing the trunks, 

 and filling up all liol-es and fissures Avith mortar, so as to render the 

 bark as smooth as possible. 



JEgerw ACER^i— Imago. — Head and labial palpi deep i-eddish orange, tlie former 

 Avhite in front of the eyes. A ntenn?o blidsh black, the basal joint reddish orange in front 

 [the terminal third sometimes Inteons.] Thorax ochreoiis yellow, with the tegula3iu 

 front touched with pale bluish black. Abdomen bluish black, varied with ochreous yel- 

 low [in well preserved specimens the hind edge of joints is distinctly yellow, and the third 

 joint is always darker than those by which it is immediately bounded] ; terminal tuft 

 deep reddish orange. Fore wings with the margins and median nervure bluisli black, 

 dusted with yellowish ; a large discal, bluisli black patch ; terminal portion of the wing- 

 ochreous yellow, with a blackish, subterminal band [often obsolete except at costa; this 

 band, which is between the discal spot and apex, separates the opaque ochreous-j^ellow 

 from the transparent part oT wing, and when it is obsolete the separation is less 

 marked], and the nervules blackish ; the hinder margin bluish black, and the cilia deep 

 fuscous. Hind wings with a black discal patch [small and subtriangular] ; nervules 

 blackish, and hinder margin blackish. Under surface of the body ochreous yellow, 

 [often bright golden-yellow], with a bluish black patch on each side of the second 

 abdominal segment. The middle and posterior tibi;x3 annulated with bluish black at 

 their ends, the anterior blackish with the cox;e touched with reddish orange. All the 

 tarsi touched with blackish above. [Costa of all wings ochreous or golden yellow.] — 

 Clemens, Proc. Ac. Nat. Sc. Phil. 1860, pp. 14, 15. 



Average expanse, §, 0.80; r?, 0.75 inch, c? differs from § in being generally lighter 

 colored, with the fringes more golden, and the tips of anal tuft steel-blue. 



Larva — Average length O.liO inch. Color edomatous-white. Body of uniform 

 diameter to joint 11, from whence it tapers suddenly to anus, joint 12 being small and 

 very short. Piliferous spots sub-obsolete, the usual hairs springing almost directly from 

 the surface. Thoracic joints much wrinkled transversely ; the middle joints gathered 

 into two slight folds on their posterior third. A deep and conspicuous medio-dorsal 

 longitudinal indentui-e, and a lateral substigmatal wrinkle. Stigmata brown and dis- 

 tinct, the last pair, on joint 11, being sub-dorsal and largest. Head small, horizontal ; 

 gamboge-yellow ; the tropin brown and prominent, with sparse, rufous hairs. Cervical 

 shield lighter colored and not well defined. Legs, and hooks on prolegs, rufous. 



The medio-dorsal indenture, smallness of joint 12, and subdorsal position of the 

 last pair of stigmata, are the most characteristic feature*. The thoracic and anal joints 

 are sometimes dusky. 



Many specimens examined. 



C/in/salis — Unarmed, the anus being smooth and rounded. 



