GRASSHOPPERS — GURNET AND BROOKS 39 



Ariz., are small and dark, in marked contrast to the richly colored, 

 more yellowish specimens reared on winter mustard at Tempe, Ariz. 

 In average specimens of bilituratus dejectus the tegmen extends about 

 4 mm. beyond the hind femur. With the exception of material noted 

 in the next paragraph, extremes among specimens examined are a 

 male from Kaibab, Ariz., and one from Phoenix, Ariz., in which the 

 tegmen extends 1.5 and 7 mm., respectively. 



Six males and 11 females from several Arizona localities are so 

 long-winged and, in the case of males, have so unusual an aedeagus 

 that they are discussed separately in order that all the data will be 

 assembled for future reference if importance should become attached 

 to them as a distinct population. The aedeagus in lateral view 

 (figs. 2,1) 3,h) has the dorsal valve extending anteriorly and with 

 little development of a concave lateral surface; however, the dorsal 

 valve differs slightly in length and shape, and in one specimen the 

 anterior apical margin is very weakly recurved in a suggestion of 

 bilituratus defectus; another specimen (from Tumacacori National 

 Monument) has a second right dorsal valve present, which approaches 

 that of bilituratus defectus, although the left one and the other right 

 one are essentially as figured. It appears that the aedeagus in this 

 series is abnormal or not fully developed, and that the specimens are 

 bilituratus defectus. Fred Skoog, collector of the Chandler specimens, 

 has informed us that they were taken among bilituratus defectus 

 where the population was 50 to 75 per square yard in an alfalfa 

 field, and 500 to 1000 along the margins of the field. The few un- 

 usually long-winged specimens found by him had only recently 

 become adult, and their somewhat teneral condition may have had 

 a bearing on the shape of the aedeagus. Other genitalic characters 

 of these specimens fall within the normal variation of bilituratus 

 defectus; the following figures illustrate them: 7,c; 8,i,; 10,j,u; 16,6. 



The general appearance of the above specimens is as shown (plates 

 2,c;4,a). Gurney (1953, pi. 7, fig. c) previously illustrated one of 

 the females from Chandler, and Barnes (1956) referred to long-winged 

 Arizona specimens; both authors applied the name M. mexicanus 

 mexicanus. The lengths of the tegmen and hind femur of these 

 specimens are, respectively, as follows: Males, 26.0-31.0 (av. 27.90), 

 13.3-14.8 (av. 14.02); females, 27.0-33.5 (av. 29.67), 15.0-17.2 (av. 

 15.93). The extremes and averages of the distance from apex of 

 hind femur to apex of tegmen are as foUows: Male, 9.0-14,0 (av. 11.28) ; 

 female, 8.0-13.5 (av. 10.04). 



The following label data accompany this long-winged material (all 

 from Arizona): Casa Grande, swept from alfalfa, July 20, 1951, 

 N. J. Nerney (Icf); Chandler, lush irrigated alfalfa. May 1945, 

 F. Skoog (2 0^, 89); Tempe, alfalfa, Aug. 31, 1938, O. L. Barnes 



