SCHISTOCERCA, SPHINGONOTUS AND HALMENUS 



449 



specimens continues unbroken across the metazona becoming, how- 

 ever, on the metazona oblique, extending downward as well as back- 

 ward. On three specimens it is faintly marked as streaks and spots 

 across the metazona, while on one it ends abruptly on the interior 

 end of this sclerite. Six specimens have two round black spots on the 

 dorsal surface of the pronotum on the suture between the prozona and 

 the metazona. One has only one very small one and this only on the 

 left side, and the spotted specimen has them obscured by the other 

 dark markings. Five have a similar pair of spots on the middle of 

 the dorsal surface of the pr^Escutum. There is no " bright white 

 broken and bent stripe " below the lateral black prozonal band, as 

 described by Scudder, on any of the specimens although such a stripe 

 is present on the Charles Island specimen. The tegmina vary con- 

 siderably. In two specimens the dorsal surface has the same color 

 as the dorsal surface of the pronotum — brownish-yellow — with 

 small dusky blotches, and the lateral surface mottled black and brown- 

 Five specimens have the dorsal surfaces brown and the lateral sur- 

 faces black or dusky-brown. The eighth has the dorsal surfaces 

 yellowish-brown and the lateral surfaces blackish-brown. Fore and 

 middle legs yellowish, spotted with black. Posterior femur with 

 basal, premedian, postmedian and apical transverse black bands reach- 

 ing over the dorsal surface from the lower inner carina to the lower 

 outer carina, the lateral parts of the first three being inclined obliquely 

 forward from above. The rest of the femur brownish-yellow, spotted 

 with black; a row of small quadrate black spots along the lower outer 

 carina. Tibia and tarsus yellowish, spotted with black, claws black, 

 the tibial spines black-tipped. Most of the specimens have the ab- 

 domen brownish below, yellowish above, with the second to eighth 

 terga inclusive having large black blotches on the sides. In one the 

 general color of the abdomen is reddish-brown and the black spots 

 meet above forming continuous black bands covering the anterior two 

 thirds of each tergum. In another the whole abdomen is brownish, 

 below darker and with a reddish tinge; all of the first segment and 

 the lateral parts of the second to eighth segments are black. 



MEASUREMENTS OF HALMENUS ROBUSTUS EXPRESSED IN 

 HALF MILLIMETERS. 



