1918.] - NATURAL SCIENCES OF PHILADELPHIA. 213 



vary from six to eight in number on the external margin and four 

 to six on the internal margin in the paratypes. The paratypie 

 male has the ulnar vein of the tegmina more oblique than in the 

 type and the first cross-vein between the anal and median veins 

 is also more oblique, forming an angle in the anal vein at its juncture, 

 the next cross-vein obliquely sigmoid, while the proximal disposition 

 of the axillary veins of the tegmina is also slightly different. One 

 of the Rio Pacaya females has the humeral vein forked near the 

 base. 



Miogryllus COnvolutUS (Johannson). 



1763. Gryllus convolutus Johannson, Amoen. Acad., VI, p. 399. [Surinam.] 



Para. (C. F. Baker.) Two females. 



Igarape-assu. January 17 to February 6, 1912. Four males, nine 

 females. 



These specimens have already been recorded by Hebard in a 

 study of the genus. ^^ 



Miogryllus verticalis (Serville). 



1839. Gryllus verticalis Serville, Hist. Nat. Ins., Orth., p. 343. [Cayenne.] 



Igarape-assu. One male. 



This macropterous individual has been recorded by Hebard in 

 his study of the genus. ^^ 



Miogryllus tucumanensis Glglio-Tos. 



1894. G[ryllus] (Miogryllus) tucumayiensis Giglio-Tos, Boll. Mus. Zool. 

 Anat. Comp. Torino, IX, No. 184, p. 41. [San Pablo, Province of Tucu- 

 man, Argentina.] 



Igarape-assu. January 17, 1912 (one). Two females. 



These specimens fully agree with the description of this species, 

 except for the presence of caudate wings and having the tegmina 

 slightly longer and overlapping. They are, as far as we can 

 determine, representative of the macropterous condition of this 

 species, a phase previously unkno\\Ti. In the two specimens the 

 tegmina measure 8.4 and 8.5 millimeters in length, while the other 

 dimensions are as given in the original description. 



The reference of the species to Miogryllus is according to the 

 original author, and merely tentative as far as we are concerned, 

 for its exact relationship to Gryllodes remains to be determined, when 

 more is known of the constancy and variation of characters in the 

 latter genus. 



=» Journ. N. Y. Entom. Soc, XXIII, p. 109, (1915). 

 " Ibid., p. 121, (1915). 



