1920.] NATURAL SCIENCES OF PHILADELPHIA. 351 



specimens, the preceding distal tergites tinged with tawny distad 

 as well. Pygidium and forceps mars brown. In one recessive 

 example with pygidium light ochraceous-tawny and forceps mars 

 brown, in another with pygidium and forceps ochraceous-tawny. 

 Limbs in intensi\e specimens blackish mummy brown, paling slightly 

 to prouts brown distad. In the majority of examples the femora 

 and tibiae are mummy brown paling to dresden brown distad, the 

 tarsi dresden brown. 



Measurements (in jnillimeiers) 



Length of Length of Width of Length of Length of 

 body pronotum pronotum tegmen forceps 



St. .Jean du Maroni. Type..S. 1.2 .9 1.8 2.9 



Charvien. Paratype 7.8 1.25 .9 1.8 3. 



Nouveau Chantier. Para- 

 type 7.9 1.25 .9 1.8 3.2 



9 



St. Jean du Maroni. Allo- 

 type 8.1 1.2 .95 1.8 2.7 



Charvien. Paratype 8.3 1.3 1. 1.8 2.8 



Nouveau Chantier. Para- 

 type 7.2 1.2 .9 1.8 2.9 



Coloration is apparently of considerable specific diagnostic value 

 in this and alhed species, but can not safely be used without full 

 consideration of the structural details, a frequent fault in past 

 literature. 



In addition to the described pair, we ha"ve before us eight para- 

 types from French Guiana. Of these one pair are from Nouveau 

 Chantier, taken in May; one pair from Charvien, taken in October 

 and November, the other four females without additional data. 



Parasparatta dentifera (Betan) 



1901. Sparatta dentifera Rehn, Trans. Am. Ent. Soc, XXVII, p. 218. 

 [ 9 ; Orizaba, Vera Cruz, Mexico.] 



Guatemala City, Guatemala, 2 9 . 



One of these specimens is smaller than the other, with special- 

 ization of the forceps less decided. Such variation is frequently 

 encountered in this and allied species. 



FORFICULIDAE. 



FORFICULINAE. 



Skalistes lugubris (Dohrn) 



1862. Forficula lugubris Dohrn, Stett. Ent. Zeit., XXIII, p. 230. [Cor- 

 doba, (Vera Cruz) Mexico.] 



Sierra de Tlalpujahua, near Toluca, Mexico, Mexico, 2400 to 2700 

 meters, 1 cf, 1 juv. Vicinity of Guadalajara, Jalisco, Mexico, XI, 1 9 . 



