i 



8 ARKIV FÖR ZOOLOGI. BAND 10. N:0 G. 



C. Antennse 6-jointed, the two last joints globiform, 

 strongly enlarged Hexaplocotes Lea. 



II. Subfam. Paussoptinidce. 



A. Antennse 11-jointed Paussoptinus Lea. 



B. Antennse 10-jointed Leaptinus m. 



G. Antennae 9-jointed Paussoceros m. 



III. Subfam. EctrepJiinoe. 



A. Antennse with a flat club consisting of 5 joints . . 



Ectrephes Pascoe. 



B. Antennae with the joints of the club, firmly grown 

 together into a broad club, showing only undistinct 

 märkes of the joints on the posterior margin . . . 



. Mesectrephes m-. 



C. Antennae with a club consisting only of a long» uni- 

 form joint Monectrephes m. 



I am much in doubt concerning the South African genus 

 Diplocotidus, the only species of which, D. formicola Péring., 

 has been found in the nest of Acantholepis capensis Ma yr. 

 PÉRiNGUEY himself considers it to be related to the Diplo- 

 co^e5-species : »It resembles very much Z)^pZoco^e5, an Austra- 

 lian genus, and might prove to be identical in spite of the 

 difference in the shape of the last joint of antennas and the 

 prothorax ...» 



As a matter of fact this South-African species has very 

 little to do with the Australian Diplocotes. Its antennse are 

 quite filiform, simple, but the prothorax remarkably deve- 

 loped, being divided by a deep transverse impression, together 

 with another longitudinal one forming a deep T-shaped figure. 

 It seems to be the only real myrmecophilous species of Pti- 

 nidce outside the Australian reQ:ion. 



1. Ptinus amoeims n. sp. (Textfig. 1.) 



Body narrow, elongate, moderatly convex, black, metalh*c 

 shining, covered by long black hairs, whitish underneath, head 

 small and broad, in the front between^the normally developed 

 eyes with two distinct snowy white spöts, antennse long and 



