Bun-, Note on the Classification of the Dermaptera. 321 



2. Tarsorum segmentum secundum simplex, cylindricum, haud 

 lobatum. 



3. Segmentum ultimum dorsale margine postico libero; pygidium 

 liberum. 



4. Femora compressa, carinulata . Farn. 2. Pygidicranidae. 

 4. 4. Femora vix vel haud crompessa, liaud carinulata. 



Farn. 3. Lahiidae. 

 3. 3. Segmentum anale cum pygidio fusum; pygidium adpressum, 



verticale ^) Farn. 4. Labiduridae. 



2. 2. Tarsorum segmentum secundum lobatum. 



Fam. 5. Forßcididae. 



Family I. Apachyidae. 



Tliis family is so well marked that Verhoeff proposed to 

 separate it into a subdivision under the name of Paradermaptera, as 

 against the whole of the rest of the earwigs which he called 

 Eudermaptera. I do not consider, however, this drastic treatment 

 necessary. I have recently revised the group (Ann. Mag. N. H. 

 [8] i. p. 51 [1908]) and no further remarks are necessary except 

 to call attention to Ä. cortieimis from Ceylon, which, in the less 

 depressed body and quadrate pronotum, affords a link with the 

 normal earwigs. On the strength of these two characters, I pro- 

 pose a new genus for this species under the name Dendroiketes n. g. , 

 Mr. Green has since shown me a second specimen agreeing exaetly 

 with the type , and there is an immature specimen in the Hof- 

 museum in Vienna. 



Family IL Pygidicranidae. 



The compressed and carinulate femora (see fig. 1) afford a very 

 convenient means of limiting this family into a fairly homogenous 

 group. This excludes the genera Pyragra, Echinosoma, and their 

 allies , which have hitherto been placed near Pygidkrana. Their 

 affinities however, are undoubtedly rather with the Labiduridae. 



The Pygidicranidae fall into five subfamilies as follows : 



1. Antennae segmentis 15 — 25; segmento 5 cylindrico, longiori 

 quam latiori. 



2. Corpus apterum 1. Anataelinae. 



2. 2. Elytra semper, alae saepius, perfecte explicata. 2. Diplatyinae. 

 1.1. Antennae segmentis plus quam 35, segmentis 4 — 6 brevibus, 



transversis. 



^) This feature is equally difficult to describe and to iüustrate: a 

 glance at the pygidium of any Labidura or Anisolabis, and then at a 

 Forficula will at once render the point obvious. 



