NEW SPECIES OF EARWIGS— REHN. 



503 



LABIDURA MONGOLICA new species. 



Type.— Femsde; Pekin, Chi-li, China. April, 11»()1. (M. L. Rohb.) 

 [Cat. No. 8164, U.S.N.M.] 



A large form of the rljjaria type and apparently allied to L. hidens 

 of the West Indies. It does not appear to lit any of the numerous 

 forms previously described, though it is possibly the one to which 

 Motschulsky applied the nonwn nHdnin of Forficula aimirmsls/^ 



Size very large; form as usual in the genus. Head rather depla- 

 nate, the impressed lines distinct but faint; eyes hardly projecting; 

 antennae with the basal joint large, subcylindrical, the second sub- 

 spherical, the third slightly more than twice 

 the length of the second, equal in width. 

 Pronotum ([uadrate, the margins very slightly 

 arcuate, the cephalic angles very narrowly, 

 the caudal angles moderately rounded; lateral, 

 longitudinal, and median transverse depres- 

 sions marked, a slight median longitudinal 

 sulcus present on the cephalic half. Tegmina 

 half again as long as the pronotum; "shoul- 

 der" angles rounded, caudal margins slightly 

 arcuate; the deflected lateral portions sepa- 

 rated from the dorsum by a distinct angle 

 cephalad, which becomes subobsolete caudad. 

 Exposed portion of the wings shoit, rounded. 

 Abdomen very slightly depressed, gradually 

 but slightly expanding caudad; anal segment 

 over twice as broad as long, lateral margins 

 subparallel, the caudal margin subtruncate 

 with a l)lunt tubercle at the base of each arm 

 of the forceps, between which are two par- 

 allel spiniform processes, as in L. h/dens/ 

 subgenital plate transverse trigonal, the apex 

 sinuato-truncate; pygidium cuneiform, the 

 apex truncate. Forceps rather long, equal 



to the exposed portion of the abdomen and anal segment united, gently 

 bowed, tips rather blunt, an internal tooth placed slightly before the 

 apical third. Limbs, with the femora slightly inflated; proximal and 

 distal segments of the tarsi equal in the cephalic and median pair, the 

 proximal much exceeding the distal in the caudal pair. 



General color tawny ochraceous, marked with blackish. Head suf- 

 fused above, the eyes clear black; pronotum black, except for lateral 

 and median longitudinal lines of the lighter color; tegmina with the 

 same color pattern as the pronotum, but the dorso-lateral angle is also 



Fig. 2.— Labidtira mongolica. 

 X 2. 



a Bull. Soc. Imp. Nat. Moscou, XXXII, p. 499. 



