NO. 1453. 



SOUTH AMERICAN GRASSHOPPERS— REHN. 



377 



STAURORHECTUS LONGICORNIS VARIEGATUS, new subspecies. 



Types. — Male and female; Chapada, Matto Grosso, Brazil. April. 

 (H. H. Smith.) [IT.S.N.M., No. 9487.] 



This form is a smaller i-ace of ^S". longicovnh inhabiting the vicinity 

 of Ciiya])a, hut the extent of its range is not known. Compared with 

 Corumba specimens of t3"pical longieonus, it shows, in addition to the 

 smaller size, a comparatively more robust form and a slightly broader 

 eye. The color forms found in the typical race are probabl}^ all found 

 in this form, two being present in the material examined, types a and 

 c',*^ the type specimens both belonging to the former. 



Measurements. 



Male. 



mm. 



Length of body I 21. 5 



Length of pronotum I 4.0 



Length of tegmen 1.5. 5 



Length of eaudal femur 14. 5 



Female. 



mm. 

 28.2 

 5.2 

 18.8 

 18.6 



One male and two females from the type locality have also been 

 examined. The months represented are April and May. 



STAURORHECTUS BREVIPENNIS, new species. 



Type. — Male; Corumba, Matto Grosso. Hi-azil (highland). March. 

 (H. H. Smith.) [U.S.N.M., No. 9488.] , 



This species differs from the preceding in the smaller size, abbrevi- 

 ated tegmina, aborted wings, the more compressed fastigium and 

 pronotum, and the shorter subgenital plate. 



Size small; form moderately slender. Head with the occiput slightl}^ 

 ascending and arched, not exceeding the pronotum in length; fas- 

 tigium acute with the apex blunt; in length less than the space be- 

 tween the eyes, moderately excavated; lateral foveolae lateral in posi- 

 tion, moderately impressed and without definite form; face moderately 

 retreating, with the dorsal section vertical and narrow!}- rounded into 

 the dorsum of the fastigium; frontal costa with the margins subparallel 

 to the ocellus and very gradually diverging thence to the clypeus, 

 slightly expanded between the antenna, moderatel}^ sulcate dorsad, 

 the ventral section excavate from margin to margin, but not sulcate; 

 eyes ovoid, nearly twice the length of the infra-ocular sulcus; antenna 

 about twice the length of the head and pronotum together, depressed but 

 not expanded proximad, rounded distad. Pronotum half again as long 

 I as the caudal dorsal width ; cephalic margin arcuate with a slight median 

 truncation, caudal margin slightly rotundato-angulate, a very faint 

 trace of constricted l^^eral carina present; median carina ver}' distinct, 



«Proc. Acad. Nat. Sci. Phila., 1906. 



