176 PROCEEDINGS OF THE ACADEMY OF [April, 



of the caudal tarsi is hardly darker than the other tarsal joints, the 

 tarsi then appearing almost uniform carmine. The eyes vary from 

 ochraceous to seal brown in color. 



Zoniopoda omnicolor (Blanchard). 



1S4Q.^* Amdium omnicolor Blanchard, in D'Orbigny, Vov. dans I'Amer. 

 Mend., VI, pt. II, p. 216, pi. XXVII, fig. 3. [No locality.] 



10 d", 9 9 . December, 1904, to March, 1905. 



This series exhibits considerable variation in size, the males ranging 

 in length of body from 29 to 37 millimeters, the females from 44 to 52. 



Zoniopoda exilipes Bruiier. 



1906. Zoniopoda exilipes Bruner, Proc. U. S. Nat. Mus., XXX, p. 654- 

 [Sapucay, Paraguay.] 



10 d", 8 ? . February and IVIarch, 1905. 



This series is quite constant in size and color. The large yellow 

 lateral sections of the subgenital plate are very conspicuous, the color 

 there being the same as on the head and more yellowish than on the 

 limbs and pronotum. 



PRIONAGRIS Stal. 



1S78. Prionacris Stal, Bihang till K. Svenska Vet.-Akad. Handlingar, V. 

 No. 4, pp. 19, 55. 



Type. — P. compressa Stal. 

 *Prionaoris erosa n. sp. 



Type: c? ; Sapucay, Paraguay. March 15, 1906. (William Foster.) 

 [Hebard Collection.] 



Allied to P. compressa from New Grenada, but of different propor- 

 tions and with the wings colored differentl3^ 



Size moderately large; form elongate; surface of thorax ruguloso- 

 punctate, of head smooth or finely punctulate. Head broad, the 

 length distinctly less than the width, the breadth across the eyes 

 being almost twice the length; occiput rounded, but little elevated 

 dorsad of the eyes, gently declivent to the fastigium, smooth, the 

 width between the eyes but little less than the length of the eye; 

 fastigium rectangulate, not broader than the space between the eyes, 

 margins not at all carinate, disk slightly depressed transversely, a 

 longitudinal median depression marked only at the immediate 

 apex, when viewed laterad the frontal costa rounds into the 

 facial outline which is slightly arcuate; frontal costa very broad, 

 defined by distinct lateral margins only in the dorsal half, the 

 ventral section being also somewhat narrower than the dorsal, not 



i« Vide Sherborn, Ann. Mag. Nat. Hist., 7th ser., VII, p. 389. 



