OF WASHINGTON. VOLUME XIV, 1912. 195 



A NEW GENUS OF ORTHOPTERA FROM GUATEMALA. 



BY T. D. A. COCKERELL, University of Colorado. 



Among the Orthoptera recently collected by my wife at 

 Quirigua, Guatemala, is a large Ceuthophilus-Vke, species, 

 which I could not place in any described genu? known to me 

 or referred to in the literature at my command. Thinking 

 that it might have been described in the Biologia Centrali 

 Americana, I sent a brief account of it, with sketches, to Pro- 

 fessor L. Bruner,who kindly writes me that he finds no such 

 insect described, adding: "Undoubtedly your insect is new, 

 and comes near Glaphyrosoma." 



MAYACRIS gen. nov. (STENOPELMATIN^E). 



Female. A large insect, with the general form and color of Ceuthophilus, 

 entirely apterous; feet with pulvilli; hind tibiae on upper side with two 

 rows of short spines, all of the same type or grade. Head oblong, not 

 wider than thorax; eyes elongate, twice as long as broad; ocelli represented 

 by large oval chalky-white patches, one on the prominence between the 

 antennae, the others on each side of the broad flattened frontal prominence; 

 vertex not tuberculate; clypeus much narrowed below, the lower half 

 strongly longitudinally sulcate in middle; labrum large, broad-oval not 

 in the least emarginate, with scattered hairs; mandibles with strong apical 

 teeth; third joint of labial palpi as long as the other two together; maxillary 

 palpi with joints 2 to 4 greatly elongated, the fifth flattened and spoon-like; 

 antennae more than twice as long as body; prothorax large, smooth, its 

 lateral inferior margins nearly straight; anterior coxae with a strong but 

 short spine; anterior tibia3 with a sulcus on each side, at the upper end of 

 which is a rounded pallid foramen-like depression (wholly unlike the 

 foramina of the Decticinae, however); femora wholly unarmed; anterior 

 tibiae with two rows of five spines each on lower side, the last three of 

 each row crowded toward the apex; there is also an apical spine on inner 

 side; middle tibiae with the same ten interior spines, and also six superior 

 ones, in two rows, the last of each row apical; hind tibiae with two rows 

 of ten short spines above, none apical, no spines below except at apex; 

 apex of hind tibiae with two very large spines (about as long as first joint 

 of tarsus) on inner side and two not so large on outer, and in addition two 

 pairs of spines beneath, the most apical pair larger and close together at 

 base; first three tarsal joints strongly sulcate or excavated beneath, and 

 variously produced at apex, but not in the least spinose; the tarsal joints 

 are only moderately compressed; ovipositor very short, compressed, gently 

 curved upwards. 



Mayacris bruneri, sp. nov. 



Female. Body smooth and shining, about 26 mm. long, dark purplish 

 brown above, very pale yellowish beneath; frontal prominence dark pur- 



