of the Genera of the Aranese. 47 



MiCROCTENONYX, Dalil, Sclirlff. natur. Sclil.-Holstein, Bd. vi. 

 p. 80 (1886). 

 Three species were originally included in this genus : — 

 (1) Erigone subitanea, Carnbr. ; (2) Micrijphantes ovatus^ 

 C. Koch ; (3) Erigone longimatia, 0. Koch. 



So far as 1 can discover, none of these have since baen 

 removed to new genera. 1 therefore select the Hrst — Erigone 

 subitanea, O. P.-Cambr. — as the type, for the genus will 

 probably go as a synonym whichever may be selected. Simon 

 has selected (Hist. Nat. Ar. ii. p. 65;3, 1894) longiminus — 

 vagans as type of Tiso ; but this cannot stand, having been 

 already removed to a new genus by Uahl. 



Type, Alicroctenonyx suhitaneus (O. P.-Cambr. )j 1875.^ 

 England. 



Paeactenonyx, Dahl, Schrift. natur. Schl.-Holstein, Bd. vi. 

 p. 85 (1886). 



A single species was originally referred to this genus — 

 Theridium parallelum, Wid. 



Type, Paracienongx parallelus (Wid.), 1834. 



Beachycentrum, Dahl, Schrift. natur. Schl.-IIolstein, Bd. vi. 

 p. 86 (1886). 



Two species were originally referred to this genus : — 

 (1) Theridium elongatum, Wid. ; (2) B. Moehi, Dahl. 



Neither of these having been removed to a new genus, I 

 select the first as the type. 



Type, Br achy centrum elongatum (Wid.), 1834. 



Hypomma, Dahl, Schrift. natur. Schl.-Holstein, Bd. vi. 

 p. 87 (1886). 



Two species were originally referred to this genus : — 

 (1) Walckenaeria hifrons, Blackvv. ; (2) Theridium hituheV' 

 culatum, Wid. 



Tlie second species liad already (1884) been definitely 

 cited as the type of Dicyphus, Menge, by Simon (Ar. Fr. 

 p. 546). And since this is not a case of simple substitution of 

 a new generic name for one preoccupied — a new species, not 

 originally included, having been added — T. bitubercu/atum is 

 not necessarily the type also of Uypomma, and furthermore 

 ought not to serve, 'i'he first remains as the type, and cannot 

 in any cfise be the type of Dismodicus, as cited by Simon 

 (Hist. Nat. Ar. ii. p. 665, 1894), having already been removed 

 to a new genus by Dahl. 



Type, Ihjpoinma bifrons (Blackw,), 1841. — England. 



