THE SKMITROIMCAL .AKMV WOKM. 55 



covered with whitish down, from tlie body of tlie female. rhe\ aii' 

 distinctly green when first deposited and have the appearance ilhis- 

 trated at h and r. 



The lurra. — The calcipillar resembles that of the other two species 

 of Prodenia sufficiently to l)e naturally referred to that genus, and 

 it is subject to similar variation in color. The ground color is dark 

 grayish in pale individuals and nearly black in the dark forms. 

 These, latter, especially when approaching nniturity in the penulti- 

 mate .stage, are sometimes so dark as to resemble ^Nlamestra. The 

 bod}'^ is ornamented with a narrow, slightly interrupted, median yel- 

 low longitudinal dorsal stripe, a similar slightly wider dorso-median 

 stripe, and a wide and brighter 3^ellow substigmatal stripe, which 

 becomes obscured in the thoracic segments of the penultimate stage. 

 In the very dark forms the triangular velvety dorsal spots character- 

 istic of the genus can .scarcely l)e seen, and in the paler forms they are 

 seldom as distinct as in the other two species. A^Hien full-grown the 

 larva measures about an inch and a fourth to an inch and a half in 

 length (25-37"'"), and the width varies from one-fonrth of an inch 

 to a iittle larger. The head measures nearly 2.5""". 



The mature larva is illustrated at f and r/ of figure 8 and a dark 

 form nearly grown at c. 



TJie pnpa. — The pupa resembles closelj' that of Prodenia comyne- 

 TtiKt'. The head and abdomen are well rounded. The color is 

 mahogany-brown, with the head, spiracles, and antei-ioi' edges of the 

 abdominal segments darker. The surface is smooth and shining, 

 with the anterior edges of the abdominal segments finely punctured. 

 The anal segment terminates in a two-spined cremaster-like process. 

 Length, Ki-lS""": width, 5-G"^'"; length of head to end of tlie wing- 

 cases, 10"^"^. 



The following technical description of the (^ii^z and l;ir\al stages 

 was kindly contributed b}^ Dr. II. G. Dyar. 



TKCHNICAL DKSCRIPTION <)I' TIM': KCHJ AND LAKVAi. srA(;i:S. 



The cfifi. — Heniisplierical. sniootli. pale screen, shiniiifi: rilis very tine, 

 fibscure, lumierous. ill-ileliiiecl, radiatiiij; froni the inicropyle; cross-striiP iiuper- 

 ceptible. Diameter. 0.0'"'". Laid in a pateli. covered l\v a tliiii layer nl" wliitisli 



WfKtl. 



SItit/c J. — Head rounded. Itilohed. ineuHi pointed, sliinini; ,!;reeiiisli-i)lack ; 

 eyes l)lacl<. nioutli brown; widlli about 0..']'"'". P.ody robust, uniform, joint 12 

 slightly enlnr.ued. feet of joints 7 and S a little smaller than the others and not 

 used in walking; translucent greenish, cervical shield, leg plates, thoracic feet, 

 anal [tlate. and the large round tubi-rcles shining black: tubercles i and ii of 

 joint 12 in a square; .setje rather coarse, moderate, black, simple. 



Htagc 11. — Head rounded, slightly bilobed, the vertex level with joint '1. shin- 

 iug luteous, blackish shaded over the vertices of the lobes; ocelli black, mouth 

 brown, width, 0.4'""'. P.ody somewhat thickened at joints ."> and 12, feet normal, 

 equal; greenish luteous, cervical shield and anal plate blackish infuscatwl; 



