Occasional Papers of the Museum of Zoology 27 



S])ecies. The ground color of the majority of individuals i? 

 dull brownish or grayish, without conspicuous markings of 

 any kind, but a number of individuals with variegated and 

 more or less conspicuous color patterns may be found in any 

 large series. On August 28 the following types were observed 

 in a barren pasture near Amidon: (i) uniform brownish gray, 

 with rather indistinct fuscous markings (a common type) ; 

 (2) dark brownish fuscous, markings obscured; (3) brownish 

 gray, metazona of pronotum light brick red, light yellowish 

 stripes along the dorsal angulations of the closed tegmina, 

 ground-color light, markings distinct; (4) same general pat- 

 tern as last, but metazona of pronotum brownish fuscous, and 

 tegminal stripes reddish brown; (5) ground-color uniform 

 gray or brown, markings distinct, closed tegmina with the 

 overlapping anal fields forming a conspicuous light stripe, 

 sometimes divided at base by a median dark stripe; (6) light 

 brownish gray ground-color, markings distinct, posterior edge 

 of pronotum narrowly edged with yellowish white, tegminal 

 stripes faintly indicated; (7) ground-color light green, dark 

 markings very strongly defined; (8) ground-color light gray 

 or yellowish white, dark markings faintly visible. These are 

 only a few of the many variations found in Mestobregiua 

 kiozua. This would seem to be a promising form for investi- 

 gation from the genetical standpoint, the principal objection 

 being that it is probably only single-brooded. 



A single one of the entire series of 431 specimens has the 

 wings slightly tinged with yellow near the base ; this was the 

 only individual among the thousands of specimens seen in the 

 field in which any color was noticeable during flight. All of 

 the other specimens have the wings either entirely hyaline or 

 with very slight fuscous shadings, usually near the apex. 



