1918.] NATURAL SCIENCES OF PHILADELPHIA. 209 



Piexe Boi. east of Para. November to December, 1907. (H. B. 

 Merrill.) One female. 



Igarape-assu. January 17 and 23, 1912 (two individuals only 

 with dates). Two males, five females. 



We have already resurrected and correctly placed this specific 

 name,^^ which antedates Saussure's kreichhaumeri, the designation 

 under which this species has been universally reported in the literature. 

 There is some variation in size in individuals of the same sex, but the 

 diagnostic features are always well marked. 



Anurogryllus muticus (DeGeer). 



1773. Gryllus mulicus DeGeer, ]Mem. Hist. Ins., Ill, p. 520, pi. 43, fig. 2. 

 [Burinam.] 



Para. (C. F. Baker.) One female. 



Igarape-assu. Two females. 



The Igarape-assu specimens are quite different in size, but this 

 is not unusual in the species. The Para individual is appreciably 

 paler than the Igarape-assu representatives, being more ferruginous 

 and, less fuscous. The three specimens examined all have caudate 

 Mings. 



APHEMOGRYLLUS^" n3w genu?. 



Related to MiogryUus Saussure, differing in the elongate and 

 slender limbs, in the elongate metatarsus of the caudal limbs, in 

 the great reduction in size of the ventral pair of distal spurs of the 

 caudal tibise, in the striking disposition of the venation of the lateral 

 field of the tegmina in both sexes, in the greater (cf) or lesser (9) 

 strangulate character of the entire pronotum and in the tegmina of 

 the male sex having no speculum present and the stridulating area 

 very simply developed. 



Generic Description. — Head broader than the pronotum: inter- 

 antennal portion of face subequal to greatest width of a single 

 antennal scrobe, this area rounded in profile: eyes heptagonoid- 

 ovate in outline, little prominent. Pronotum broader than long, 

 distinctly ( cf ) or appreciably ( 9 ) strangulate : lateral lobes distinctly 

 longer than deep, the ventral margin obliquely arcuato-truncate. 

 Tegmina of male with dorsal field but weakly developed as a stridulat- 

 ing area, no speculum present ; lateral field with two veins in addition 

 to the mediastine vein, these diverging from the base and widely 

 spaced: tegmina of female with venation of lateral field as in male, 

 venation of dorsal field simple. Cephalic tibiae with a decided, 



« Trans. Amer. Entom. Soc, XLIII, p. 128, (1916). 

 •*' From a, without; V''/!"'/ voice and Gryllus. 



