272 BRAZILIAN ORTHOPTERA 



General color dull cream-buff, overlaid with points, blotches and clouds of 

 blackish brown, the carina being more or less regularly beaded with this 

 darker color, while the dorsum of the pronotum shows dark lateral patches 

 cephalad of the humeral angles and the femora and tibiae are much suffused 

 with the same shade. 



Length of body, 16.4 mm.; length of pronotum, 20.2; greatest width of dor- 

 sum of pronotum across the humeral angles, 4.2; length from fastigium to apex 

 of pronotum, 21.2; length of tegmen, 3.4; length of caudal femur, 10. 



The type is unique. 



EUMASTACINAE 



Eumastax semicaeca (Brunner) 



1897. Mastax semicaecus Brunner, Observ. Color. Insects, pi. 15, pi. IX, figs. 

 118a, 118b. [Upper Amazon.] 



Para, Para. (W. M. Mann.) One female. 



Peixe Boi, east of Para, Para. November to December, 

 1907. (H. B. Merrill.) One immature male. 



Abuna, Rio Madeira. (Mann and Baker.) One female. 

 Although these specimens have lost their natural color tones 

 by immersion in a spirit preservative, the adults show very 

 plainly the peculiar bicolored condition of the eyes characteristic 

 of this species. The present records are the only definite ones 

 known for the species, which is seen to range over a large portion 

 of the Amazon valley. 



PROSCOPINAE 



Tetanorhynchus humilis GigUo-Tos 



1897. T[elanorhynchus] humilis Giglio-Tos, BoUett. Mus. Zool. Anat. Comp- 

 Univ. Torino, xii, no. 302, p. 18. [San Lorenzo, Argentina; Caiza and 

 San Francisco, Bolivian Chaco.] 



Baturite Mountains, State of Ceara. (W. M. Mann.) 



Two females. 

 Baixa Verde, State of Rio Grande do Norte. (W. M. Mann.) 

 Five males, one female. 

 It was with considerable surprise that we recognized this species 

 in the material from the extreme eastern portion of Brazil. We 

 have before us a male and a female cotype received in exchange 

 from Dr. Borelli and the present specimens show no differences 

 when they are compared. In both sexes we find some variation, 

 as usual in the group, in the relative length of the entire head and 

 the rostrum, while in the number of spines on the caudal tibial 

 margins there is much variation. The spine formulae of the dor- 

 sal margins of the caudal tibiae of the specimens before us are as 

 follows : 



