and species of PselaphidcB and ScydmcEnidce. 515 



character by winch it can be distinguished from A. 

 Duhoulayi, as does also the want of the lateral patches of 

 pnbescence The sexual characters of the male are less 

 strikmg; the angulation of the front tibije inwardly 

 appears either as a smaU angular projection, or as an 

 emargination of the lower part, according to the point it is 

 viewed from. A pair of this species was given me four 

 or five years ago by M. Henri Deyrolle, after whom I 

 ha^e named it. I have no locality for the species but 



SCYDM^NID^. 



ScydmcBnus optatus, n. sp. Elongatus, angustulus, 

 brunneus, yix punctatus, sed pube suberecta elongata sat 

 dense vestitus; oculis minutis; palpis maxillaribus arti- 

 culo ultimo gracili ; antennis tenuibus, elongatis, articulis 

 nullis transversis ; pygidio nudo ; abdomine segmento 

 quinto ventrali medio baud distinguendo; carina meso- 

 sternali elongata sat alte elevata; trochanteribus posterio- 

 ribus femorum longitudinis dimidio. Long, coi-p. 2 mm. 



_ Mas, tarsis anterioribus basi vix dilatatis, subtus longius 

 pilosis. 



Antennae slender and elongate, longer than bead and 

 thorax, the 9tli joint slender and elongate, nearly three 

 times as long as the 8th joint; 10th joint nearly as long as 

 9th and twice as broad as it; 11th joint elongate, pointed, 

 oval, longer and a little broader than 10th. The maxillary 

 paljji are elongate, the 3rd joint elongate, slender and but 

 little longer than the preceding one; 4th joint invisible. 

 Thorax longer than broad, its greatest breadth in front of 

 the middle, thence distinctly narrowed to the base; it has 

 no basal impressions. Elytra slender and rather elongate, 

 without impressions or plicae. Legs long and slender. 

 The carina separating the middle legs is quite thin, and is 

 continued along the elongate mesosternum, which has a 

 large impression on each side the carina, to accommodate 

 the front cox£e. 



West Australia ; collected by Du Boulay. I have only 

 a single pair. 



ScydmcBnus Edioardsi, n. sp. Elongatus,^ angustus; 

 piceo-rufus, nitidus, pube suberecta parcius vestitus ; oculis 

 mediocribus ; antennis elongatis, gracilibus ; palpis articulo 

 ultimo gracili ; pygidio nudo; carina mesosteniali fere de- 



