75 



1890. ühisiitlac pars Balzan (46.) p. 407. 



1891. Ohisiiiltie -^ Chthonünae -f- Pseiidobisiidue Bal/an (12.) p. 508. 



1894. Obisüdne Hansen (49.) p. 232. 



1895. Ohisiinae -=- Chilwnini Banks (50.) p. 2. 



Front margin of the céphalothorax prolomjed into a median tooth. Tibia of the 

 palps is not calice-shaped. Troclianlin of the foiirtli pair of legs has the articulate 

 membrane alike anteriorly and posteriorly. Tarsi are two-jointed. 



While the Chthoniidae Hans, is a well circumscribed family, characteristic by 

 a number of characters, the same can not be said about the Obisiidae Hans.; the 

 two subfamilies, of which the latter family is composed, have only a single (or 

 two) characters in common, which is not found either in the Chthoniidae Hans, or 

 the (iarypidae Hans., namely tlie median tooth-shaped prolongation of the front 

 margin and perhaps the presence of a lateral terminal hair on the tarsus (cf. p. 45). 

 This family is distinguished from the Chthoniidae Hans, by the two-jointed tarsus 

 of the first pair of legs, by the shape of the tibia of the palps, which is not calyci- 

 formed and by the simple articulation between the trochantin and the distal |iorlion 

 of the fourth pair of legs; from the Garypidae Hans, it dilfers es])ecially ))y the 

 nol fusing of the serrula exterior with the fingers, by the general absence of the 

 lamina exterior and by the structure of serrula interior. 



The differences between the extreme forms of this family are so great, that it 

 is really difficult to tell, whether a species like Ideoroncus laminatns n. sp. is most 

 similar to a species of Obisium CK. or to one of Olpium L. K.; when nevertheless 

 Hansen is right in dividing the group, with which we deal now, into two sub- 

 families instead of like Balzan dividing il into two families, it is because only one 

 character proves sharp by comparison between the species, which stand in the 

 middle, in contrast to a good many, when the extreme forms are compared. 



Subfamily I. Ohisiinae Dad. 



1889. Obisiinae Daday (11.) p. 167. 



1891. Obisiinae Balzan (12.) p. 508. 



1894. 0/)/,s((nae Hansen (49.) p. 232. 



1895. Obisiini (pars of Obisiinae) (50.) p. 2. 



Antennae without galea and lamina exterior; serrula interior without plate- 

 shaped portion. Hand of the palps without tactile hairs. Articular mendudnc 

 between the trochantin and the femur proper of the fourth pair perpendicular on 

 the longitudinal axis. 



I. Characteristic of Subfamily. 



The céphalothorax is distinctly longer than broad and with the front margin 



prolonged into a distinct median tooth; two, four or none eyes are present; skin 



smooth with pointed iiairs. The tergites of the abdomen are never longitudinally 



divided. The antennae are moderately large, but never half as broad as the 



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