MUSEUM OF COMPARATIVE ZOOLOGY. 9 



ACRIDIDiE. 

 Subfamily TRUXALIN^. 



CLOSTERIDBA {K\w<rTiip, elSos), gen. nov. 



Body moderately stout, broadest at the mesothorax and tapering conically 

 in either direction, more rapidly in front; resembling in general appearance 

 the Sphenarife among Pyrgomorphina. Head shaped in general like that of 

 Machcerocera; vertex slightly convex and rugose, separated from the plane but 

 equally rugose vertical fastigium by a transverse sulcus near the front margin 

 of the eyes ; fastigium subtriangular, as long as broad, narrowly truncate and 

 rounded in front, forming slightly less than a right angle with the frontal costa ; 

 lateral foveolte obscure, shallow, obovate, visible from above ; frontal costa 

 narrow, gradually broadening below the ocellus, sulcate; face above rapidly, 

 below the lower level of the eyes moderately declivent; eyes moderately prom- 

 inent, very much shorter than the gente; antennae moderately slender, a little 

 longer than the head and pronotum together, the fourth and succeeding joints 

 depressed but not expanded, of nearly equal width throughout. Pronotum en- 

 larging rapidly and regularly backward, truncate at both ends, subcompressed, 

 the surface convex and hardly separate by a faint carina from the lateral lobes, 

 which are longer than high, the front margin sinuate, the outer margin straight 

 and horizontal in posterior half, oblique and faintly arcuate in anterior half. 

 Presternum unarmed. Minute and wholly inconspicuous elongate pads in 

 place of tegmina. No wings. Fore and mid legs rather slight; hind femora 

 rather slender, unarmed at tip, the genicular lobes rather slight; hind tibife 

 enlarging only a little just before the tip, externally with nine, internally with 

 ten spines. Abdomen subconical, compressed, rugose, carinate mesially, the last 

 segment deeply sulcate longitudinally. 



Closteridea bauri, sp. nov. 



Plate I. Figs. 4, 5. 



Whole body bluntly rugose, the ruga3 often longitudinal, especially upon 

 the pronotum. Griseous ; sides of frontal costa and the equally ]iromincnt 

 lateral carinae of the face distantly pointed with black ; clypeus and laljrum 

 tinged with luteous and brownish fuscous; antennae sordid white, streaked and 

 marked with brownish fuscous, apically punctate and with a few brief fine 

 hairs. Sides of dorsal field of pronotum with a distinct smooth area, slightly 

 depressed and sharply delimited, of a velvety warm brown, margined outwardly 

 by the lateral carina;, inwardly by an otherwise straiglit angulate line, which 

 extends from in front a little inward across the i)rozona, outward across the 



