380 COLEOPTERA. 



equal loiigth and brcadtli, curvedly narrowed towards and of the same 

 width as thorax at the base ; with fine sutural striae and a short basal 

 impression alongside each. Hind-body as broad as elytra, basal segment 

 almost as long as they are, broadly margined, horizontal, and bearing a 

 very short band of sponge-like greyish clothing at its base, the other seg- 

 ments deflexed. 



Logs elongate and slender, femora medially subclavate ; posterior tibiae 

 straight and very slender above but witli ;i tliiid of their a])ical ])ortion 

 slightly ex])anded externally. 



Antennae rather slender and elongate, finely pubescent ; basal joint 

 cylindric, stout, nearly twice the length of the next, joints 3-8 almost 

 equally elongate, 9th and 10th thicker and slightly longer ; the terminal 

 larger, straight at one side, the other widest behind the middle and gradu- 

 ally attenuate towards the extremity. 



Maxillary palpi slender, shorter than the antennae. 2nd joint curved, 

 more gradually incrassate near the extremity than at the base, 3rd thick 

 and very short, 4th half of their whole length, thicker near the base than 

 at the middle, its clavate apical portion a third of its whole length. 



Male. — Mesosternum pubescent, grooved along the middle, with carinate 

 edges there. Metasternum strongly convex along the middle. Basal seg- - 

 ment short, with yellowish sponge-like vestiture ; 2nd very large, not very 

 broadly depressed medially, the sides of the depression strongly elevated 

 and forming laterally compressed tubercles near the apex ; 3rd and 4th 

 short and widely emarginate ; 5th semicircularly. hardly visible in the 

 middle ; 6th as long as the preceding 3 combined, apparently punctate, 

 and bounded behind by the last dorsal segment. Trochanters very elon- 

 gate, extending beyond the sides of the body and quite visible from above. 



In P. ventralis (2742) the mesosternum has a simple mesial carina. The 

 metasternum is a good deal shorter, and the 2nd ventral segment is 

 concave for half of its width but is not tuberculate behind. 



Length, 2 mm. ; breadth, quite ^ mm. 



Oakden, near Mount Algidus. Discovered by Mr. Roderick TTrquhart, 

 along with some other Coleoplera. on the 25tli September, 1913. and named 

 in his honour. 



3832. Pselaphus oviceps sp. nov. 



Nitid, fusco-rufous, palpi and tarsi testaceous ; sparingly covered with 

 subdepressed, slender, brassy setae. 



Head ovate, widest in line with the slightly convex eyes, almost as broad 

 as the middle of thorax there ; median channel deep, extending as far as 

 the back part of the eyes, somewhat expanded between these ; occiput 

 convex, antennal tubercles horizontal. Thorax, excluding the broad neck, 

 rather longer than broad, widest near the middle ; with a small punctiform 

 fovea at the middle of the base, the larger lateral ones shallow. Elytra of 

 the same width as thorax at the base, gradually expanded behind, slightly 

 broader than long ; with fine sutural striae, alongside each of these there 

 is a deep, short, basal depression with subcarinate outer edges. Basal 

 segment of hind-body nearly as long as the elytra, rather broader near 

 its extremity. 



Antennae finely pubescent, their 2nd joint quite half the length of 

 the basal, joints 5-8 rather longer than 3rd or 4th, 10th slightly shorter 

 tlian 9th. 



