The Dermatoidera. 303 



This species is quite different from the American M. 

 brunnea, Serv,, and from the Sumatran 3f. modiglianii, 

 Bonn. ; in appearance it rather resembles a Sparatta, but 

 is distinguished by the generic characters. 



EEVISION OF THE GENUS OPISTHOCOSMIA, DOHRN. 



A number of new forms have been described since the 

 publication of de Bormans' monograph, and so I have 

 drawn up a new table of the species. 



The species are as variable as in most genera of the 

 Dermatoptera ; it is common to find, in a series of one 

 species from the same locality, specimens with spotted 

 elytra and others with unspotted elytra ; these varieties, 

 which do not deserve the rank of sub-species, or a separate 

 name, I have placed twice in the table, 



I cannot admit Verhoeff's genus Cosmiella, which is 

 only based upon the absence of wings, a notoriously un- 

 stable and valueless character; at the best, it can only be 

 accepted as a sub- gen us. 



TABLE OF SPECIES. 



1. Alas abbreviatse (Cosmiella, Verb.) 

 2. Forceps (J supra dente magno 



armatus 1. rebns, Burr. 



2.2. Forceps supra dente nullo. 



3. Segmentum ultimum dorsale ,^ 

 $ baud vel vix impressum nee 

 tuberculatum ; forcipis braccbia 



cJ basi contigua 2. neolobophoroides, Burr. 



3.3. Segmentum ultimum dorsale (^ 

 distincte impressum et sub- 

 tuberculatum ; forcipis ^ brac- 

 cbia basi baud contigua, paullo 

 remota. 

 4. Colore nigro. 



5. Pronotum abdomenque ni- 



tentia 3. dubia, Borm . 



5.5. Pronotum abdomenque 



baud nitentia .... 4. aptera, Verhoeff. 

 4.4. Colore brunneo, fusco-varie- 

 gato, cupite rubro. (Forceps 



(J inermis) 5. micheli, sp. n. 



TRANS. ENT. SOC. LOND. 1904. — PART II. (JUNE) 20 



