1917.1 NATURAL SCIENCES OF PHILADELPHIA. 231 



DERMAPTEROLOGICAL NOTES. 

 BY MORGAN HEBARD. 



In the many large exotic collections at hand, but very few specimens 

 of Dermaptera are to be found. In no case are the forms of the 

 order sufficiently represented to give anything but a fragmentary 

 faunistic knowledge, excepting in the West Indian, Mexican, Costa 

 Rican and Panamanian series, which are being reported on separately. 

 The study of these important series has offered an opportunity to 

 determine the one hundred and four specimens discussed below. In 

 several instances features of decided interest are encountered, the 

 types of several old species are discussed, while among the thirty-one 

 species recorded, one new genus and six new species are found. 



Our hearty thanks are accorded to Dr. F. E. Lutz, of the American 

 Museum of Natural History, Dr. Samuel Henshaw, of the Museum 

 of Comparative Zoology and Prof. Lawrence Bruner, of the Univer- 

 sity of Nebraska, not only for the loan of undetermined material, 

 but of historic specimens and types as well, enabling us to work out a 

 number of vexing problems. Mr. A. N. Caudell, of the United 

 States National Museum, has also helped us greatly, but the rule of 

 his institution, preventing the loan of types, has obliged us to omit 

 the consideration of certain species which bear on our work, the status 

 and relationship of which is not at present clearly understood. 



PYGIDICRANID^. 



PYRAGRIN^. 

 Pyragra fuscata Serville. 



1831. Pyragra fuscata Serville, Ann. Sci. Nat., XXII, p. 34. [Cayenne.] 

 Chanchaniayo, Peru, 19, [A. N. S. P.]. 



Pyragropsis brunnea (Burr). 



1909. Pyragra brunnea Burr, Ann. Mag. Nat. Hist., (8), III, p. 254. [Fon- 



teboa, Brazil {ucc Peru) ; Iguapo, Peru.] 

 Kangaruma, British Guiana, VII, 13, 1911, (F. E. Lutz; in forest trail), 



Icf, [A. M. N. H.]. 

 Kaiteur, British Guiana, VIII, 12, 1911, (F. E. Lutz; taken by sifting), 



19, [A. M. X. H.]. 



The male is in every way typical. The female is larger; length of 

 body, 13.2, of forceps 2.9 mm. This female has the head, pronotum, 

 tegmina and exposed portion of wings lustreless blackish brown; 



