NOTES ON EXOTIC FORFICULIDS OK EARWIGS, WITH 

 DESCRIPTIONS OF NEW SPECIES. 



By James A. G, Rehn, 



Of the Academy of Natural Sciences of Philadelphia. 



The following records and notes have been made almost wholly from 

 the United States National Museum collections, a few specimens from 

 other collections having been studied and noted when of interest for 

 comparative or faunistic reasons. 



My thanks are extended to Dr. Richard Rathbun and other officials 

 of the Museum for the privilege of studying this and other collections. 



Genus PYGIDICRANA Serville. 



1831. P[igldicrana Serville, Ann. Sci. Nat., XXII, p. 80. 

 Type. — P. V-nigrum Serville. 



PYGIDICRANA PERUVIANA, new species. 



7y/7>(^— Female; Piches and Pei-ene valleys, 2,000-3,000 feet, Peru. 

 (Soc. Geogr. de Lima.) [Cat. No. 8171, U.S. N.M.J 



Apparently a very distinct species of the genus. 



Size rather large; form depressed, subequal; surface minutely 

 tuberculate and supplied with line stiff hairs, which are longest on the 

 head and shortest on the abdomen. Head trigonal, deplanate, caudo- 

 lateral angles of the head subrectangulate; eyes distinctly though 

 moderatel}" projecting laterad; antenna? with eighteen joints present 

 (terminals missing), the proximal joint large, moderately long, cylin- 

 drical, second joint short, third joint about equal to the first in length, 

 l)ut slenderer, cylindrical, remaining joints increasing in size distad 

 from the subspherical fourth joint, Pronotum slightly longer than 

 l)road, somewhat produced meso-cephalad, rounded .caudad, lateral 

 margins subparallel, angles rounded; longitudinal lateral depressions 

 distinct, transverse depression much shallower and caudad of the 

 middle; a ver}^ faint and shallow precurrent, median sulcus is present. 

 Tegmina about twice the length of the pronotum, the "shoulder" 

 angles broadly rounded, the caudal margins obliquely trimmed toward 

 the median line. Exposed portions of the wings not quite equal to 



Proceedings U. S. National Museum, Vol. XXIX— No. 1432. 



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