532 Transactions of the Society. 



metaparameres are nearly as long as the proparameres, long, rather 

 narrower at the apex than at the base, and rounded at the tip. I 

 can detect a portion of the virga looped near the base of the 

 preputial sack. 



It contains only the Indian H. maindroni Bor. (PI. X, fig. 1). 



Genus Titanolahis Burr. 



This genus is well characterized by the metaparameres, which 

 are shorter than the proparameres, gently curved, and rounded at 

 the apex, with a slight dilation on the inner margin near the apex. 

 The virga is very long, and simple. 



It contains only the "gigantic Australian, T. colossea Dohrn 

 (PL X, fig. 2). 



Genus Labiolurocles Dubr. 



This genus remained unknown since the original description of 

 Dubrony in 1879 until quite recently. It is practically a fully- 

 winged Titanolahis with lobed meso- and meta-sterna. The genitalia 

 agree ; the metaparameres are as long as the proparameres, narrow, 

 and rounded at the apex. The preputial sack has chitin-plates 

 near the apex, and the virga is long, looped at the base and coiled 

 at the anex. 



The only known species is the Papuan L. robustus Dubr. 

 The so-called Labidurodes of Shiraki certainly do not fall here ; 

 probably most of them are Eudermaptera, and the two or three 

 species described some years ago by myself urgently need re- 

 examination ; probably they have no relation at all with L. 

 robustus (PL X, fig. 3). 



Second Group.— Psalides. 



In which the metaparameres are from three to four times as 

 long as broad. 



This group at first sight does not seem to be a very natural 

 one ; but Mandex is only a Psalis with the elytra strongly recued 

 to mere lateral flaps, that is, externally, for the parameres are of a 

 very distinctive form. Anisolabis differs little from Psalis in the 

 genitalia, and externally is only an apterous Psalis, as I have 

 previously maintained ; Logicolabis is a slightly modified Anisolabis. 



I feel constrained to accept the reduction of the virga here to 

 be only of sub-generic rank. 



