( 342 ) 



like unliiiiin modfuta //ifli/i:,s/a. According to Ily. Edwards, /.c, tlie ('aliibrinan 

 siieciiueiis of i/ioi/esta are much paler in ground-colour, differing markedly from 

 the eastern form. He unites with tlieiu Arizona si)ecimen8, wliich are indeed 

 conspieuoiisiy diU'crriit, from Atlantic examples. It is ])0ssil)le that Edwards had, 

 besides Arizona specimens, only individuals of a second brood from California, 

 which we presume are all or partly jjaler than those from hibernated pupae. If 

 that was the case the name P. modesta modestu f. t. occi<h'nt<(U.'i nuxy be employed 

 for them, and f. t. modeatn. for the ordinary dark form. 



Tiie amount of red on the hindwing is variable. There is generally a pale 

 distal Ixirder as in Sjjiunx jamaicensis. Sometimes the black bar or spot before 

 the anal angle becomes more or less red anteriorly. fSize variable. Apical lobes 

 of iiarpe about equal in length, obtusely rounded. Tentli sternite truncate or 

 emurginate. Tuotli of duct of penis large. 



Il(il). (Canada to Louisiana, westwards to Calitbrnia, Oregon, and British 

 (V)lnmbia. 



In thi' Tring Museum some larvae and jiupae, I5i) S 6 , Ifi ? ? from : N. Jersey ; 

 Iowa; Oliio; South Dakota; Uritisli ( 'oinuibia ; South ( 'aiifoniia. 



I). I\ modesta iiiiperator. 



Smerinlkits iici-hhnlalin var. Edwards, Pnti: Calif. Ac. Xul. Sri. vi. p. 92 (187G) (partim ; Ft. Yuma, 



Arizona). 

 Smerinthux iiiipenitor Strecker, Lej,. Rhnp. 11,1. p. 125. t. 14. f . H ( $ ) (1878) (Arizona) ; Edw., Ent. 



Amer. iii. p. 22.^(1887). 

 Triptogon iinjiemlor, Smith, Tniiis. Aiiki: Ent. Soc. xv. p. 217 (1H88) (Arizona). 



Edwards's occidcnfalig inch;des tlie jiresent subspecies. As Edwards speaks 

 in his description of " our examples " of modesta, we accept the Galifornian modesta 

 as being the true occidentalis and retain the name imperator for the Arizona form. 

 The examples from (Jolorado which we have, mostly collected by Mr. Oslar, come 

 very near imperator, ajjproaching somewhat the palest individuals of mod. modesta ; 

 one of them, iiowever, labelled Durango, 12. vi. '99, is darker tluin any individual 

 of modesta which has come under our notice, the olive median baud of tlie forewing 

 being very pronounced and the red colour of the hindwing not only being restricted, 

 but also much obscured. Tiie (Jolorado modesta, therefore, are neither true mod. 

 modesta, nor true 7nod. imperator, but form a connecting link. 



c??. Large, rough-scaled. Stigma of forewing large, diseal lines strongly 

 crenate ; pale abdominal and anal area of hindwing more extended than in mod. 

 modesta ; the ])roximal black anal bar narrow and long. Lobes of harpe unequal, 

 tlie upper one generally much shorter (Fl. XXX IV. f. 31) ; tooth of penis-sheath 

 much smaller than in 7nod. 7/iodesta ; both the tenth tergite and sternite narrower, 

 the latter more obviously rounded at end (PI. XXII. f 13). 



There are two broods in Arizona, which we name : 



(f'. P. modesta imperator f t. imperator. 



c??. The si)ring-brood. Forewing greyish white at the proximal side of the 

 median band and between the two crenate diseal lines ; the band more or less 

 shaded with grey or bntf, but the proximal border-line always conspicuous, c? 

 darker than ? . 



Received from Dr. E. Knnze, labelled as follows: Phoenix, Arizona, 0. iv. '97 



