236 



species ■» Glycyphagus" , because the Q is provided with a copula- 

 tion tube, I again will try to break up the great genus and to 

 justify the reasons why I do so, or why authors before me did. 



First we have a genus Homopus C. L. Koch 1841, with H. 

 hypudaei C. L. Koch as type. As the name Homopus is preoccu- 

 pied (1835, Dutnéril et Bibron) the name Dermacarus Halier, 

 1878, must take the place of it. Michael considers Labidophorus 

 Kramer as a synonym of Homopus C. L. Koch ; I can not go 

 with him. Homopus hypudaei C. L. Koch is a creature closely 

 related to Hypopus arvicolae Dujardin, and as I have pointed out, 

 I hope sufficieutly, in the Tijdschrift voor Entomologie, v. 43, p. 

 126 — 127, t. 6, f. 39 and 40, this latter hypopus has two post- 

 anal lip-like claspers, under which there is a club-like organ, 

 wbich I consider as a pedunculated sucker, consequently quite 

 like the hypopus of Dermacarus sciurinus (C. L. Koch). The ge- 

 nus Dermacarus Haller therefore is characterized lst. by its 

 hypopus, and 2d. by the adult having cephalothorax and abdo- 

 men fused ; the Q epimera I separate; copulation tube scarcely, 

 if any, projecting (indeed a primitive character). It contaius the 

 following species: 



1 (8) Dermacarus sciurinus (C. L. Koch), 1841. 



2 (9) » hypudaei (C. L. Koch), 1841. Adult unknown. 



3 (10) » arvicolae (Dujardin), 1849. Adult unknown. 

 Secondly the genus Labidophorus Kramer, 1877, with Labido- 

 phorus talpae as type. — This genus is characterized lst. by its 

 hypopus, which, like that of the foregoing genus, has two lip- 

 like claspers, but lacks the pedunculated sucker, and 2 d. by the 

 adult having a demarcation between cephalothorax and abdomen 

 far forward; cephalothorax small; 9 epimera I joined to sternum 

 or to the circumvulval ring; copulation tube conspicuons; hairs 

 on dorsum of abdomen spinous. The following species belongtoit: 



1 (12) Labidophorus talpae Kramer, 1877. 



2 (17) » dispar (Michael), 1886. 



3 (18) » platygaster (Michael), 1886. 



Thirdly the genus Ctenoglyphus Berlese 1884 (synonym: Glycy- 



