1913.] NATURAL SCIENCES OF PHILADELPHIA. 379 



General color of the head, pronotum, dorsum of tegmina, and 

 exposed portion of the wings prout's brown, lateral aspect of the 

 tegmina and the limbs wood brown. Eyes dull ferruginous; antennae 

 dull naples yellow. Several irregular linear touches of seal brown 

 are placed on the dorsal side of the humeral trunk on the distal half of 

 the tegmina, these markings being co-extensive with certain linear 

 cell areas of the same region. Ovipositor obscure burnt sienna with 

 the tips blackish. Femora distinctly sprinkled with points of burnt 

 umber, the tibiae with a few of the same character; the spots on the 

 femora disposed in linear and, as a rule, balanced series. 



Measurements. 



Length of body 17. mm. 



Length of pronotum 3.3 



Length of tegmen 12 .3 



Length of exposed portion of the wing 7.2 " 



Length of caudal femur 7.3 " 



The type of this very interesting species is unique. 



SubfamUy TRIGONIDIIN.^. 

 Thamnoscirtus amoenus (Burmeister). 



1880. PhylloscirUts amoenus Burmeister, Abhandl. Naturfor. GeseU. Halle, 

 XV, p. 18, pi. 1, figs. 8-10. [Mouth of the Riachuelo, Buenos Aires, 

 Argentina.] 



Buenos Aires. February 20, 1909. Three males, one female. 



This striking species is a true Thamnoscirtus, and not a Phylloscir- 

 tus, the head being vertical and not at all horizontal. Saussure has 

 described a very closely related species from Guiana as Thamnoscirtus 

 viridicatus.^^ 



Giglio-Tos has recorded this species from the Province of San Pedro, 

 Paraguay, as ? Thamnoscirtus cicindeloides Gerstaecker,^^ later 

 correcting the determination to Phylloscirtus amcenus.^^ 



SubfamUy ENEOPTERIN^. 

 Diatrypa tuberculata Saussure. 



1874. Diatrypa tuberculata Saussure, Miss. Scient. Me.x., Rech. Zool., VI, 

 p. 479. [Buenos Aires.] 



IMisiones. April 30, 1910. (No. 1.) One male. 



This species has been recorded only from Buenos Aires, the Misiones 

 and Sapucay, Paraguay (Caudell). Our specimen is striped on the 

 pronotum in a similar fashion to the female examined by Caudell. ^^ 



^Biol. Cent.-Amer., Orth., I, p. 240. 



" Boll. Mus. Zool. Anat. Comp. Torino, IX, No. 184, p. 40. 



^Zool. Jahrb., Abth. Syst., VIII, p. 816. 



59 Proc. U. S. Nat. Mus., XXX, p. 243. 



