1904.] NATURAL SCIENCES OF PHILADELPHIA. 517 



Syrbula eslavae Rehn. 



1900. Syrbula eslavce Rehn, Trans. Amer. Ent. Soc, XXVII, p. 90. [Eslava, 

 D. F., Mexico.] 



La Joya, San Lids Potosi. August 10, 1903. (M. E. Hoag.) One 



male, one immature female. 



Genus MACH.ff;ROCERA Saussure. 



1859. Machcerocera Saussure, Revue et Magasin de Zoologie, 2e ser., XI, 

 p. 391. 

 Type. — M. mexicana Saussure. 



Machaerocera mexicana Saussure. 



1859. Miacharocera] mexicana Saussure, Revaie et Magasin de Zoologie, 2e 

 ser., XI, p. 391. ["Mexico calida."] 



Alta Mira, Tamaulipas. June 26, 28 and 30, 1903. (M. E. Hoag.) 

 Two males and one female. 



A study of twenty-two specimens of this species from Tamaulipas, 

 Vera Cruz and Morelos furnishes no constant diagnostic character 

 for separating the Vera Cruz form as Thomas's sumichasti, as has been 

 done by Bruner.^ A pair of this species, labelled in Saussm-e's hand- 

 writing and presented by him, the male from "Mexique; Sumi- 

 chrast," and the female "Orizaba, reg. temp. Sumichrast," agree with 

 the rather large series studied. As the latter specimens are authori- 

 tatively determined and agree with specimens from Jalapa as well as 

 Alta Mira, I feel justified in considering them all one species. 



Maohaerocera pacifica Bruner. 



1904. Machcerocera pacifica Bruner, Biol. Cent.-Amer., Orth., II, p. 51. 

 [Tepic, on the Pacific slope, not far from San Bias.] 



Guadalajara, Jalisco. August 24, September 14 and 18, 1903. 

 (McClendon.) Five males. 



A fairly well-marked species, distinguished by the slender posterior 

 femora and rather hea\der antennae. 



Genus AMBLYTROPIDIA sai. 

 1873. Amhlytropidia Stal, Recensio Orthopterorum, I, pp. 93, 107. 

 Type. — A. ferruginosa Stal. 



Amblytropidia ingenita Bruner. 



1904. Amblytropidia ingenita Bruner, Biol. Cent.-Amer., Orth., II, p. 67. 

 [Orizaba; Chilpancingo, Guerrero; Cuernavaca, Morelos.] 



Cuernavaca, Morelos. September, 1900. (Barrett.) One female. 

 This individual is rather larger than Bruner's maximum measure- 

 ments. 



^Biol. Cent.-Amer., Orth., II, p. 51. 



