38 pygidicrajVid^. 



The abdomen is cylindrical and generally narrower near the 

 base than at the apex, whieli is usually more or less dilated. 



No known Indian members of the family are apterous, but 

 totally wingless forms occur in certain parts of the world. 



Two subfamilies are represented in India. 



Table of Subfamilies. 



1. Antennae with 15-25 segments, the fifth 



cylindrical, longer than broad. (Size [p. 38. 



small or medium, build fragile.) .... I. Diplatyince, 

 1.1. Antennae with over 30 segments, the 

 fourth, fifth, aud sixth short, globular, 

 not longer than broad. (Size large or 

 very large, build robust and powerful [p. 53. 



as a rule.) II. P>/gidicraiiince, 



Subfamily I. DIPLATYIN^. 



This subfamily contaius the single genus Dijilaiys, Serv., if we 

 agree to sink Cylindrofj aster, Stal. 



Genus DIPLATYS, Serv. 



Diplatys, Servilh, (31) p. 33. 



Dyscritiua, Westioood, Trans. Ent. Soc. Lo7idon, 1881, p. 601 (larva). — 



Tt/2)e, D. longisetosa, JVestw. 

 Nannopygia, Dohrn, (68) p. 60. — Type, N. gerstfeckeri, Dohrn. 



Type, Forficula macrocepJiala, Pal.-Beauv. 



Body glabrous or hairy. Stature small and slender. An- 

 tennae with 16-20 rather thick segments, almost cylindrical ; 

 first long and thickened at the apex, second very short, third 

 longer, fourth about half as long as third, fifth a little longer ; 

 the remainder gradually lengthening. Head rather broad, pen- 

 tagonal, usually different in the sexes ; in the S globose, 

 smooth, and tumid, with obsolete sutures, or more often tumid 

 between the eyes and strongly depressed posteriorly, the two 

 parts often sharply separated by the transverse suture ; sutures 

 very distinct or obsolete ; posterior margin truncate or emar- 

 ginate, somewhat reflexed into an incrassate transverse ridge 

 which continues round the corners to the eyes ; a more or less 

 sharp ridge often runs from behind the eyes to the posterior 

 angles of the side ; sides of the head parallel or converging pos- 

 teriorly, in which case the head is lanceolate ; median suture 

 sometimes very distinct, sometimes replaced by a short keel ; in 

 the $ the head is generally simpler, more approaching quadrate, 

 smooth, not notably tumid or depressed, and somewhat broader. 

 Prouotum small, narrower than the head, sometimes a little 

 longer than broad, usually as broad as long, produced and narrowed 

 anteriorly with a short neck ; sides parallel or convex ; posterior 

 margin truncate, the angles rounded ; prozona usually tumid ; 



