292 ENTOMOLOGICAL NEWS. [Nov., '03 



On two Earwigs of the genus Labia from Costa Rica. 



BY JAMES A. G. REHN. 



These specimens were received for examination too late to be 

 included in a general study of the earwigs collected by Messrs. 

 Schild and Burgdorf (vide Proc. Acad. Nat. Sci. Phila., LV, 

 (1903). PP- 299-3 l 2). 



Labia aimnlata ( Fabric! us). 



1793 (Forficula] annulata Fabricius, Entomolog. Syst., ii, p. 4. 



[" Americae meridionalis Insulis."] 

 Labia arcuata Scu'dder, Proc. Boston Soc. Nat. Hist , xviii, p. 257, 



1876. 



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

 [U. S. N. M] . 



This specimen differs from the usual type in the absence of 

 yellowish markings on the pronotum. 



The name here revived for this species seems to be perfectly 

 applicable. This fact has already been noticed by Bormans 

 and Krauss (Das Tierreich, XI Lief., Forficulidae und Hemi- 

 meridae, p. 69), who, however, did not revive the name. 



Labia auricoma n. sp. 



Type : 9 ; Piedras Negras, Costa Rica. (Schild and Burg- 

 dorf). [Cat. No. 6942, U. S. N. M]. 



Allied to L. chalybca Dohrn, but differing in the smaller 

 size, the yellow colored pronotum (which is also of compara- 

 tively smaller size and has the posterior margin more arcuate), 

 the hairs on the abdomen being golden instead of black, in the 

 posteriorly constricted tegmina and the small exposed area of 

 the wings. Relationship also appears to exist with L. c/iam- 

 pioni Bormans, but the latter is separated by the unhaired 

 body, the short tegmina, subequal abdomen, and different 

 coloration. 



Size very small ; body stout, centrally constricted. Head polished ; 

 antennae composed of fourteen joints, sub-moniliform. Pronotum trans- 

 verse, not equalling the head and considerably less than the tegmina in 

 width ; anterior margin truncate, posterior arcuate, the laterals sub- par- 

 allel ; transverse central depression marked, the median portion with a 

 distinct longitudinal sulcus anteriorly. Tegmina broad, subequal in 

 width in the basal half, tapering in the apical portion ; lateral sections de- 

 flected ; scapular angle well rounded ; apical section gently rounded ; 



