June, 1915.] HeBARB: AMERICAN SpECIES OF MiOGRYLLUS. 105 



and that of the Academy of Natural Sciences of Philadelphia. The 

 collections of the United States National Museum, Museums of Com- 

 parative Zoology and Brooklyn Institute of Arts and Sciences have 

 been examined through the kindness of their curators and we have 

 been further assisted by Professor A. P. Morse, Mr. Wm. T. Davis 

 and Dr. J. Chester Bradley. For this kind cooperation we wish to 

 express our deepest gratitude. 



Miogryllus convolutus (Johannson). 



1763. Grylhts convolutus Johannson, Amoen. Acad., VI, p. 399. [Suri- 

 nam.] (Macropterous J.) 

 ^772- Gryllus ater De Geer, Mem. I'hist. Ins., Ill, p. 5J0. [Surinam.] 



(Macropterous 5.) 

 1838. Grlyllus^ pusillus Burmeister, Handb. Entoni. II, 2 Abth., pt. i, 



p. 7i3- [Brazil.] (Macropterous.) 

 1858. Gryllus nitiduliis Stal, Kongl. Svensk. Freg. Eug. Rcsa, II, p. 315. 



[Buenos Aires, Argentina.] (Micropterous J.) 

 1874. Gryllodes micromegas Saussure, Miss. Sci. Mex., Rech. Zool., VI, 



p. 418. [Mexico.] (Micropterous J.) 

 1874. Gryllodes brevipennis Saussure, Miss. Sci. Mex., Rech. Zool., VI, p. 



418. [Peru.] (Micropterous J-) 

 1874. Gryllodes parvipennis Saussure, Miss. Sci. Mex., Rech. Zool., VI, 



p. 419. [Santa Catarina, Brazil.] (Micropterous $.) 

 1896. Nemboius distingiiend^is Scudder, Jour. N. Y. Ent. Soc, IV, p. 



loi. [Orizaba, Mexico.] (Micropterous 5-) 

 1896. A^ iemobius~^ delicatus Scudder, Psyche, VII, p. 433. [San Rafael, 



Vera Cruz, Mexico.] (Macropterous (^ and 5-) 



No Other species of Orthoptera in the large collections from the 

 Guianas before us fits Johannson's brief description of convolutus, 

 with which large series of macropterous examples of the present 

 insect agree perfectly. De Geer's ater is evidently a slightly ampli- 

 fied description of the same insect. Burmeister's pusillus from Brazil 

 agrees also in every detail, and he further describes the normally 

 striking coloration of the caudal femora; his description is of the 

 macropterous condition also, but with tegmina more abbreviate. 

 Stal's nitidulus represents the larger and somewhat paler condition 

 found in Argentina as demonstrated by material before us; these dif- 

 ferences are by no means sufficient to warrant the retention of the 

 name as a geographic race. His specimen is micropterous but with 

 long tegmina, a condition also represented in material before us, 



