440 Annals of the Carnegie Museum. 



The locusts referred to this genus belong to South America and are 

 found between the equator and about 36 south latitude. They 

 differ from the species of Tetanorhynchus and Corynorhynchus 

 chiefly in having the sternum of the prothqrax separated from the 

 dorsal portion by well-defined lateral, longitudinal sulci, and in the 

 front being straight rather than sinuose. About twenty species have 

 been described thus far. 



26. Cephaloccema costulata Burmeister. 



Cephaloccema costulata Burmeister, Abhandl. Naturf. Ges. Halle, XV, p. 9, No. 3 

 pi. 1, figs. 3-7 (1880); Brunner, Verh. Zool.-Bot. Ges. Wien, XL, pp. 115, 116 

 (1890); Giglio-Tos, Boll. Mus. Zool. Anat. Comp. Torino, XII, No. 302, pp. 19, 

 20 (1897); Bruner, Second Rept. Locust Comm. B. Aires, p. 20, pi. 6 (1900); 

 Ib., Proc. U. S. Nat. Mus., XXX, p. 619, pi. 36, fig. 1 (1906). 



Habitat. — Chapada and Corumba, Brazil where the dozen or more 

 specimens were taken from April to September inclusive by H. H. 

 Smith. Most of this material is immature. 



This seems to be the most abundant as well as most widely dis- 

 tributed species of the genus. 



27. Cephaloccema sp.? 

 There is still another species of the genus Cephaloccema at hand. 

 It is represented by. a single female coming from Chapada, Brazil, 

 where it was taken by H. H. Smith in December. This insect exhibits 

 several of the characteristics described by Rehn in connection with 

 his Cephaloccema ckapadensis (Proc. Acad. Nat. Sci. Phila., 1904, p. 

 681). The measurements of the female of chapadensis are 75.5 mm. 

 long while the present specimen is 92 mm. long. Rehn's insect had a 

 head 15.5 mm. long while this one has it 16.5 mm. in length. The 

 spine formula for the hind tibiae is 10-10 in our specimen, while Rehn's 

 is given as 12 externally and 9 or 10 internally. The rostrum of this 

 specimen has the sides parallel, the apex blunt and viewed from in 

 front quadrate, the carinae rather prominent and cruciate. Its length 

 a little less than the remainder of the head, or 8 mm. In stature this 

 specimen is moderately robust, at least more noticeably so than in 

 C. costulata Burmeister. If not chapadensis it might be known 

 temporarily as C. cuyabensis Bruner. 



28. Cephaloccema calamus Burmeister. 



Cephaloccema calamus Burmeister, Abhandl. Ges. Halle, XV, p. 11, No. 4 (1880); 

 Brunner, Verh. Zool.-Bot. Ges. Wien, XL, pp. 115, 116, No. 4 (1890). 



