50 University of Michigan 



margin thickets, in fields of second growth scrub, and in grassy 

 fields a short distance from the margins of woodland. In the 

 dune area it was common about the margins of the oak and 

 beech-maple woods, and in small openings in them; it was 

 also of regular occurrence, but scarce, in the denser parts of 

 these woods, where several specimens were found among the 

 dead leaves, and others were taken in molasses traps set for 

 Blattids and Ceuthophilus. 



Copulating pairs were noted June 28 and July 16. The 

 male and female taken September 9 at New Bufifalo are very 

 late records for this species, which is most common in the late 

 spring, and has usually disappeared by the end of July. Han- 

 cock records it, however, as occurring at Lakeside in August. 



The cerci of all but two of the thirty-one males secured are 

 of a type intermediate between typical viridipcs (the western 

 form) and the recently described curycercns of Hebard. Two 

 of the males from the Sawyer Dunes taken in company with 

 these intermediates are, however, referable to typical z/iridipes. 

 All of the entire series of sixty specimens show the recessive 

 coloration characteristic of viridipes; in many of the specimens 

 the bands of the external face of the hind femora are scarcely 

 visible, and in none are they fused below as in the majority 

 of specimens of eii^rycerciis. In a number of specimens, most 

 of which are from the Warren Woods, the cerci are very sim- 

 ilar in proportions to those of specimens of atypical curycercns 

 from Ann Arbor, Washtenaw County, Michigan. The latter, 

 however, show much more intensi'.ve coloration, the hind 

 femora being conspicuously banded with black, the bands 

 fusing at the lower margin of the pagina. Berrien County 

 evidently lies in the area of intergradation between the two 

 forms, as was to have been expected from the fact that all of 

 Hebard's specimens from Lake County, Indiana, the adjacent 

 region to the west, were intergrades. 



