1903.1 NATURAL SCIENCES OF PHILADELPHIA. 299 



STUDIES IN AMERICAN FOIIFICULID.5:. 



BY JAMES A. G. REHN. 



The material treated in the following pages is contained in the 

 collection of the United States National Aluseiun. The privilege of 

 examining this series was secm'ed through the kindness of Mr. William 

 ■ H. Ashmead,, Assistant Curator of Insects in that institution. 



Family FORFICULID^. 



The general arrangement of the species under this family is accord- 

 ing to the system used by De Bormans and Krauss.^ The scheme of 

 classification recently proposed by Verhoeff^ has not been considered, 

 as the WTiter has made no investigations into the characters there 

 brought into prominence. 



Genus PYRAGRA Serville. 

 1S31. Pyragra Serville, Ann. Sci. Nat., XXII, p. 34, 

 Type: P. fuscata Serville. 

 Pyragra fuscata Serville. 



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

 One female; San Carlos, Costa Rica. (Schild and Burgdorf.) 

 [U. S. N. M.] 



The use of Dohrn's later name saussurci for this species appears un- 

 warranted, as Serville's specific name is based on a description which is 

 fairly complete, and perfectly apphcable to this form. 



This species has been recorded from localities between south central 

 Mexico (Cordova and Atoyac) and French Guiana. 



Geuus ECHINOPSALIS De Bormans. 

 " 1893. Echinopsalis De Bormans, Biol. Cent.-Amer., Orth., I, p. 2. 

 Type: E. guttata De Bormans. 



1 Das Tierreich, 11 Lieferung: Forficulida? und Hemimeridse, Berlin, 1900. 



2 Zoologischer Anzeiger, XXV, pp. 181-208; and Sitzungs-Bericht der Gesellschaft 

 naivrforschender Freunde, Berlin, 1902, pp. 7-18. 



