SCHISTOCERCA, SPHINGONOTUS AND HALMENUS 429 



dorsal surface, somewhat invaded by yellowish, at the lateral angle a 

 faint narrow longitudinal band of yellow, below this a similar band 

 of black, and below this again a second yellow band slightly wider 

 than the upper, below which and reaching the lower margin of the 

 prozona punctate black ; thoracic sterna alike in color, pale leathery 

 brownish-yellow ; sides of meso- and metathorax dull yellowish-brown, 

 somewhat browner than the sterna, with small amount of dusky infu- 

 sion ; a pale yellowish median carinal stripe on pronotum ; fore and 

 middle legs of same color as sides of mesothorax, both femora and 

 tibiae marked with small black spots ; ground color of hind femur about 

 same as color of metasternum ; on dorsal aspect of femur, reaching 

 across from middle of one side to middle of other, three large rectangu- 

 lar black areas, between which are yellowish areas of same size, the 

 first is a little in front of middle of the femur, the most posterior termi- 

 nal and the median half way between the other two, lower mai-gin of 

 the first and the second indistinctly united by a faint longitudinal black 

 band ; rest of the femur shaded with brown, and along the outer lower 

 carina punctate with black ; abdomen plain brown ; tegmina pale 

 brownish, paler and somewhat yellowish, on premedian part, post- 

 median area maculate with quadrate dusky spots, largest and blackest 

 anteriorly. 



Variations (34 specimens). — In some specimens the color of the 

 body is almost uniform dull reddish-brown, paler and more yellowish 

 beneath with most of the markings on the head obsolete and those on 

 the prozona very faint. The lower black stripe and upper yellow one 

 of the prozona are the most persistent markings. In most of the speci- 

 mens there is present with varying distinctness a black stripe just 

 above the upper yellow stripe, so that the markings of the prozona are 

 better described as a black longitudinal band on the upper part of the 

 sides, split with yellow, below which is a wide yellowish area and 

 between it and the lower margin of the prozona the color is punctate 

 black. In some cases the upper yellow band is almost obliterated by 

 a fusion of the two bordering black stripes, or the yellow is left as a 

 small spot in the middle of a wide black band. In other cases both 

 the yellow and the black are obscure, or the yellow forms a small spot 

 at the angle of the scutum with a slight amount of black below it. 

 The postocular stripe of the head is in most cases split longitudinally 

 with yellow and the two parts are continuous with the two black bands 

 of the prozona. The head in most cases has a faint median stripe on 

 the vertex continuous posteriorly with the equally faint median stripe 

 on the pro- and metazona. The latter stripe is lacking in only a few 



