LABIA. 123 



Length of body 7"5 mm. 7 mm. 



„ forceps 2-5 „ 1'5 ,, 



Burma : Karen-ni, Keba District, 3000-3700 ft., vi./xii., i./xii. 

 (Genoa 3Jus.). 



Also recorded from Java, Oahu (coll. Burr), and Hawaii (Ferlcins, 

 Brit. Mus., coll. Burr). 



Type in the Genoa Museum. 



L. pygidiata is recognizable by the star-shaped pygidium, but 

 probably two species are confused under one name. The Hawaiian 

 specimens have the elytra much lighter in colour, and very deci- 

 dedly shorter and the wings shortened, so that the transverse 

 yellow band is hidden by the elytra, the pronotum is half yellow, 

 the fifth antennal segment is more clubbed and the other seg- 

 ments more pyriform : the forceps of the female have the inner 

 margin denticulate throughout their length. This is perhaps an 

 insular form, an incipient species, which we may soon be able 

 to discriminate accurately when we can critically examine more 

 material from its entire geographical range. 



73. Labia arachidis, Yersm. (Fig. 82.) 



Forficula arachidis, Yersin, (60) p. 509, pi. x, figs. 3.3-35 ; Scudder, 



(76) p. 311. 

 Chelidura arachidis, Brunner, (82) p. 21. 

 Aptervgida arachidis, Burr, (00^) p. -52, (01) p. 330, (07^) p. 209; 



Borm. (00-) p. 117 ; Kirhy, (04) p. 44. 

 Forficesila nigripeunis, Motsch. (63) p. 1 ; Dohrn, (65) p. 89. 

 P'orficula wallacei, Dohrn, (65) p. 88 (tvpe iu Dohru's collection); 



Dubr. (79) p. 337 ; Scudder, (76) p. 318. 

 Forficula (Apterygida) gravidula, Gerst. (73) p. 50, pi. 3, fig. 9. 

 Labia gravidula, Borm. (84^) p. 197. 

 Apterygida gravidula, Borm. (00-) p. 117. 

 Sphiiigolabis wallacei, Bor^n. (88) p. 448. 

 Sphingolabis arachidis, Borm. (94) p. 406 ; Bol. (97) p. 286. 

 Sphingolabis gravidula, Borm. (93) p. 407. 



Dark brown or castaneous, hairless. Antennae with 12-13 

 segments. Pronotum square, with the lateral mai'gins paler, 

 and the posterior margin straight. Elytra free, black or reddish, 

 the hinder margin truncate. Wings abortive. Legs testaceous. 

 Femora sometimes with a blackish band near the base. Abdomen 

 glabrous, each segment with a very short pubescence at the hinder 

 margin ; segments 5-8 in the male, and sometimes also the forceps, 

 slightly punctulated. In the male the anal segment is sub- 

 quadrate, impressed in the middle, with no tubercles ; the forceps 

 have the branches remote at the base, short, slender, cylindrical, 

 gently incurved, with a very small tooth on the inner margin at 

 the base itself and another in the apical third. In the female 

 the anal segment is the same as in the male ; the branches of the 

 forceps are short and curved in towards the apex. 



