388 Mr. M. Burr on 
remarkable. I have seen immature specimens of allied 
genera in various stages of growth, but know of no case 
which presents an analogous development. 
There still remain two insufficiently described creatures, 
at present assigned to the Forficulidz, whose true position 
is doubtful but may be determined in time, as has been 
that of Dyscritina longisetosa. One of these is Condylopalama 
agilis, Sund., taken at Stockholm in timber imported from 
Brazil, which Mr. Kirby suggests may be Japyz. The 
other doubtful species is T'yphlolabia larva (Phil.), which 
possibly is not an earwig. 
It is not yet clear to what group earwigs are most 
nearly allied; but it seems to me that earwigs and 
cockroaches are offshoots of acommon stock. Some exotic 
cockroaches present an arrangment of the wings which is 
analogous with the folding of the wings of earwigs, and the 
development and general habits of the two groups are 
almost identical. A wingless earwig with jointed cerci 
would resemble a small wingless cockroach to a very 
marked extent. It is not meant to advance this theory as 
a definite view but rather to throw it out as a suggestion. 
It was altogether unexpected that two species should 
be derived from the old Dyscritina longisetosa. Early last 
summer Mr. Green kindly sent me, among a lot of earwigs, 
an adult D. longisctosa; but at that time neither of us 
suspected that it was the imago of this curious larva, and 
I then regarded it as a new species of Cylindrogaster, Stal. 
As Mr. Green’s two species are to be referred to the 
genus Diplatys, Serv., the first will be Diplatys longisetosa 
(Westw.); the other I regard as identical with Diplatys 
nigriceps (Kirby) from which it differs only in minor 
details of coloration. D. nigriceps (Kirby) is already 
known from Hong-Kong and Bombay, but D. longisetosa, 
so far as I know, has never been taken outside Ceylon. 
As the latter species has not been described in the imago 
stage, I append a description, and to make things com- 
plete add a further description of D. nigriceps (Kirby). 
Diplatys longisetosa (Westw.). 
Larva. Dyscritina longisetosa, Westwood, Trans. Ent. 
Soc. Lond., 1881, p. 601, pl. xxii, fig. 1; Green, 
op. cit., 1896, p. 229. 
Colore testacea. Caput pronoto latius: pronotum subquadratum | 
margine postico rotundato. Elytra et alae perfecte explicatae, longe, . 
