70 CLARK — NEW SPHINGIDAE Pvol^Vlf" 



reaches. On the veins Rl, R2, R3, and Ml, and between this line and the 

 distal margin, are four dark brown dots. A dark brown, apical, triangular 

 area between SC4 and SC5 extends 3 mm. costally. Within it, distally, is 

 a lighter, semicircular, marginal area. A dark brown stigma at apex of 

 cell. A dark basal L-shaped mark, with its base at right angles to the costal 

 margin, is very evident in the female, and less so in the male. A narrow, 

 dark, angled, sub-basal line extends from a point 4 mm. from the base on 

 the costal margin to the inner margin. The distal margin of the wing is 

 wavy , produced at R2. 



Hind wing above: Smoky gray. Extending from the anal angle sub- 

 marginally is a dark, sharply marked Une to Ml. Basad of it, on SM2 and 

 M2, are dark dots. Between these two veins, one third the distance to the 

 wing base, is a dark dash 1 mm. in length. Between the submarginal line 

 and the distal margin is another dark, but less prominent, line. These two 

 submarginal hnes extend faintly toward the inner margin, with dark dots 

 on the veins. 



Fore wing below: Wood-brown. Lighter along costal margin. A Une, 

 from a point on costal margin 7 mm. from the apex, convex distally to the 

 inner margin, which it reaches at its median point. A dark, angled, sub- 

 median line duplicates that on the upper side from SC5 to the hinder angle. 

 Distal to this line is a lighter area. Cilia dark at the veins. 



Hind wing below: Light brown, similar to marginal area of fore wing. 

 A dark, discal, curved hne extends from a point on the inner margin to the 

 anal margin. It first curves sharply distally to R3, basad to M2, and 

 finally basad to anal margin. A dark, angled, postdiscal hne extends, 

 roughly parallel to the distal margin, from inner to anal margin. Between 

 it and the margin at the anal angle is a dark area. 



Isognathus allamandae sp. nov. 



Al. ant. long., cf, 30 mm.; 9, 35 mm. Al. ant. lat., cf, 9 mm.; 9, 

 12 mm. Marg. ext., cf, 14 mm.; 9, 17 mm. 



Habitat. — Pernambuco, Brazil. Four males and four females in coll. 

 B. Preston Clark, taken in March by my friend Rev. A. Miles Moss, and 

 named at his suggestion after the food plant. One male also in coll. B. 

 Preston Clark, taken by Mr. T. T. Dyar in February, 1919, at Para, Brazil. 



Closely allied to Isognathus australis Clark, but a narrower-winged insect. 



Fore wing above : Gray, with darker markings, and lightly shaded with 

 white. More uniform in color than in /. australis. The black streak, R3- 

 Ml, is 6 mm. in length; a second black streak, M1-M2, is 4 mm. in length; 

 both are heavier than in /. australis, and are absent in the female. Distal 

 margin dentate, convex, and obtusely angled at R3. 



The evenly curved white line, SC2-R1, of /. australis is absent, being 

 replaced by a straighter, geminate gray line, which takes the same course 



