52 



PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



Size medium; form of medium build. Head with the occiput 

 rounded but hardly elevated above the dorsum of the pronotum, inter- 

 space between the eyes slightly narrower (o^) or slightly broader ( $ ) 

 than the proximal antenna! joint, fastigium distinctlj^ broader than 

 the interocular space, rather deeply (c?) or shallowly ( 9 ) sulcate, the 

 sulcation extending caudad between the eyes ; "frontal costa distinctly 

 (c?) or slightly (9) wider than the interspace between the eyes, 

 impresso-punctate dorsad of the ocellus in the male, punctate in the 

 female, in the male strongly sulcate around and ventrad of the ocellus, 

 in the female moderately sulcate at and for half the distance ventrad 

 of the ocellus, the costal margins slightly constricted dorsad and very 

 slightly approximate ventrad; eye subovate in the male, ovate with 

 the cephalic margin flattened in the female, when viewed from the 

 dorsum the eyes are moderately prominent in the male, very slightly 

 prominent in the female; in length considerably (cJ*) or not greatly ( 9 ) 

 longer than the infraocular portion of the gense; antennse in the male 

 slightly shorter than the head, pronotum and tegmina together, in 

 the female very slightly longer than the head and pronotum together. 

 Pronotum with the disk very gently arched transversely, the lateral 

 angles rounded, the median carina distinct on the cephalic half of the 



Fig. 8. — Melanoplus desultorius ii. sp. Lateral view of male t\'pe. (X 3.) 



prozona and on the metazona, more elevated on the metazona and 

 obsolete on the caudal half of the prozona ; cephalic margin very slightly 

 arcuate, the caudal margin very obtusely angulate; metazona closely 

 punctate, in the female also with very fine transverse strigse, prozona 

 about one and three-eighths times the length of the metazona, prin- 

 cipal transverse sulcus well marked in both sexes, the prozonal sulci 

 breaking the median carina in the male, not dividing the same in the 

 female; lateral lobes half again as long as deep in the male, slightly 



