502 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



the pronotuni in lenj^th, rounded with the tips squarely truncate. 

 Abdomen with the sides parallel; anal segment large, equal to the 

 pronotum in length and very slightly wider than the other segments, 

 with extremely faint traces of a median depression and the caudal 



margin truncato- emarginate; subgenital 

 plate arcuate with the apex subtruncate 

 and slightly emarginate mesad. Forceps 

 moderately long, depressed, carinate above, 

 the tips rather bluntly hooked, the internal 

 margins crenulato-dentate. Femora con- 

 siderably inflated, particularly the cephalic. 

 Tarsi compressed, the second notdepressed, 

 the terminal joint on all the limbs at least 

 as long as the basal. 



General color of the head, antennte, pro- 

 notum, tegmina, and exposed portions of 

 the wings seal brown; a narrow margin on 

 each side of pronotum, an elongate lance- 

 olate spot on each tegmen, placed near the 

 mesal line of the body, restricted to the 

 cephalic three-fourths and with the apex 

 caudad and a blotch covering the internal 

 two-thirds of each wing tawny ochraceous. 

 Abdomen liver brown, the segments ex- 

 cept the anal slightly darker proximad. 

 Forceps dark liver brown, ventral surface of the same and the sub- 

 genital plate burnt sienna. Limbs tawny ochraceous, the tibiss marked 

 dorsad with blackish. 



Measurements. 



mm. 



Length of body (excluding forceps) 18.5 



Length of pronotum 3. 5 



Length of tegmen 7.2 



Length of exposed portion of wing 2. 



Length of anal segment 3. 2 



Breadth of anal segment 3. 2 



Length of forcejjs 6. 5 



Fig. 1.— Pygidiceana peruviana. 



Genus LABIDURA Leach. 



LABIDURA RIPARIA (Pallas). 



1773. Forficula riparia Pallas, Reise Russ. Reichs, II, buch 2, p. 727. ["Habi- 

 tat in ripis prseruptis, arenosis, prtecipue ad Irtin copiosissima, canalibus 

 horizontalibus latens. ' ' ] 



Luebo, Kongo. (D. W. Snyder.) [U.S.N.M.] Three females. 

 I am unable to separate these individuals from a female from 

 Morocco determined by Saussure and fully representing true riparia. 



