90 Studies in Kansas Insects. 



Chortophaga viridifasciata D. G. 

 Lugger. Orthoptera of Minnesota, 234; 1. c. 



This common locust is exceedingly variable, and a number of varie- 

 ties occur, which shade into each other. Two well-marked varieties are 

 found, the green form (virginiana Fab.), and the brown form (infuscata 

 Harris). This dichromatism is largely, but not entirely, characteristic of 

 sex, most of the females being green, of the males brown. 



The green variety is the typical one; wing covers with a broad, green 

 stripe on the outer margin, extending from the base beyond the middle, 

 and including two small dusky spots on the edge, the remainder dusky, 

 but semitransparent at the end; wings transparent, very pale greenish- 

 yellow next to the body, with a large dusky cloud near the middle of 

 the hind margin, and a black line on the front margin. Antennas, fore 

 and middle legs reddish; hind femora green, with two black spots in the 

 furrow beneath. This form is the larger one. 



The dusky-brown variety has the wing • covers faintly spotted with 

 brown; wings transparent, pale greenish-yellow next to the body, with 

 a large dusky cloud near the middle of the hind margin, and a black 

 line on the front margin; hind femora pale, with two large black spots 

 on the inside; hind tibiae brown, with darker spines, and a broad whitish 

 ring below the knees. The hind tibiae differ much in color in different 

 specimens, being variously tinted with brown, blue, pink, or purple, 

 without regard to sex. Many intergrades occur, in which the head and 

 pronotum are of a reddish velvety brown. 



This species is one of our most common cedipods. It is quite gen- 

 erally distributed in grass land throughout the state, appearing among 

 the first in the spring and lasting throughout the summer. 



Measurements in Millimeters. 



Body. Tegmina. Post, femora. 



Female 31.0-27.0 25.0-22.0 17.0-13.5 



Male 23.0-19.5 20.0-15.0 13.0-11.0 



(See fig. 39, page 69.) 



Encoptolophus Sc. 

 Bost. Soc. Nat. Hist., vol. 17; 1874-'75. 



Allied to Tragocephala' Harr. Head but little tumid above; front 

 vertical above, i-oundly declivant below the costa, nearly equal, but broad- 

 ening and fading on approaching the labrum, a little constricted above 

 the antennae; vertex moderately broad, the eyes being separated by their 

 own width, the summit of the head minutely and bluntly carinate as far 

 forward as the middle of the fastigium; the latter somewhat declivant, 

 tapering anteriorly, distinctly though not very deeply hollowed; lateral 

 fastigia triangular, slightly transverse, scarcely, sulcate; eyes moder- 

 ately large, shaped as in Tragocephala. Antennae as long as (female) or 

 much longer than (male) the combined head and pronotum, the joints 

 flattened, on the apical half punctate. Disk of pronotum nearly flat, the 

 median carina abrupt but not greatly elevated, cut into two equal halves 

 by a distinct though slight notch; lateral carinas distinct but broken, 

 very slightly arcuate; posterior margin of the pronotum forming a 

 rather sharply marked right angle; tegmina rather broad and short, but 

 little surpassing the tip of the abdomen, the basal half of the costal 

 margin sinuate, the apex broadly rounded, scarcely obliquely docked; 

 wings short and broad, pellucid or nearly pellucid, with a postmedian 

 costal stigma and more or less duskiness near the outer border, the 

 principal veins of the front area broader than long. Type. GZdipoda 

 sordida Burm. 



