214 REVISION OF PTERGHELvEUS (coiltd.) AND SARAGUS, ETC., 



with two spurs at apex (one very short), posterior tibiae armed 

 with two minute spurs. 



9- Differs from the male in having the tibiae much less enlarged 

 at apex, and being without apparent granulations. Dimensions, 

 1 3 X 3| mm. 



ffab. Muswellbrook, New South Wales (Dr. E. W. Ferguson). 



I have named this interesting species after its discoverer, who 

 has generously given me the only pair taken by him. The species 

 is easily distinguished from 0. cylindricus mihi, and 0. Behri 

 Germ., by its shorter, more ovate, and less cylindrical form, wider 

 prothorax, and the marked sexual characters of the tibiae, shown 

 in the accompanying figure. The female specimen might well be 

 confused with that of Cardiothorax politicoUis Bates, but foi' the 

 complete absence ot foliate margins to the prothorax. The 

 curiously produced epistoma is unlike anything I have seen in 

 this or allied genera, showing a triangular outline when viewed 

 from behind. 



Otrintus ACACIKNSIS, ll.Sp. 



Elongate-ovate, rather flat, moderately nitid bnnvnish-black; 

 antenna;, tarsi, and tibia? opaque piceous-hrt)wn; underside brown, 

 tarsi and inside of tibiae clothed with red hair. 



Head: maxillary palpi very long, apical joint darker than the 

 pi^eceding joints, labrum very prominent, epistoma rounded and 

 widely convex, limiting suture deeply impressed, curved in front, 

 oblique at sides, foveate at the acute angles so formed, forehead 

 with a raised stirrup-shaped impression, with one oi' two foveate 

 punctui'es, the whole head coarselv punctate; antennae very long 

 and robust, extending considerably beyond base of prothorax, 

 third joint subcylindric, not as long as the fourth and fifth com- 

 bined, joints 4- 1 varying gradually from obconic to ovate and 

 gradually wider, eleventh twice as long as tenth, elongate-ovate. 

 Prothorax, of (J, 4 x 3-5 mm.; of 9, 4 x 4 mm , length measured 

 in middle; widest at middle, subtruncate at apex, coarctate at 

 base, wider at apex than at base; sides not sinuate, converging 

 lightly anteriorly, more strongly posteriorly, anterior angles 

 round and obtuse, not pi'ominent, margins narrowly horizontal 



