802 CLAVICORNIA. [Psamma'cltus. 



I am not aware if it occurs in England, but immature specimens of P. 

 lipunctatias seem to come near it. 



HYPOCOPRINA. 



The position of this tribe has always been a source of great discus- 

 sion, ever since the genus Hypocoprus was first discovered ; the majority 

 of authors have referred it to the Cryptophagidae, to which it certainly 

 is somewhat closely related ; Thomson (Skand. Col. x. 353) regards it 

 as intermediate between Mbnotoma and Myrmecoxenus ; Dr. Horn 

 (Classification of the Coleoptera of North America, p. 140) places it as 

 a tribe of the Mycetophagidae ; on the whole, however, the position 

 assigned to it by Reitter between the Psammaechina and Silvanina, 

 appears to be the most natural, and I have, therefore, although with 

 some reserve, adopted it. 



HVPOCOPRUS, Motschulsky. 



This genus comprises two or three species from Europe and Madeira ; 

 our single species is very rare, and has not been found for many years. 



K. latridioides, Mots. Elongate and linear, upper surface rather 

 depressed, slightly shining, with very fine and scarcely visible pubes- 

 cence, pitchy-black with the antennae and legs ferruginous ; head rather 

 large, subtriangular ; antennae rather long, inserted at some distance 

 before eyes, 11-jointed, with the last three joints thicker, forming a 

 club ; thorax longer than broad, subquadrate, with the sides not crenu- 

 late ; elytra obsoletely punctured, without striae, broadly rounded at 

 apex ; anterior coxae not widely separated, all the tarsi 5-jointed. L. 

 1-1 j mm. 



Very rare ; under cow-dung in a sandy field at Brandon, Suffolk ; taken sparingly 

 by Mr. Crotch ; it appears to be very scarce on the Continent. Thomson compares 

 this puzzling species to Monotoma longicollis, to which insect it bears a superficial 

 resemblance ; R.ye says that it may be superficially described as a black specimen of 

 Lissodema ^-guttata, of the size of Lathridius ruficoltis. 



SILVANINA. 



Six genera belonging to this tribe are found in Europe, three of which 

 are represented in Britain ; several of the species are cosmopolitan ; the 

 anterior coxal cavities are broadly closed behind, and the tarsi are 5- 

 jointed in both sexes, and have the fourth joint very small. 



I. Club of antenna? 4-jointed NAUSIBIUS, Redt. 



II. Club of antennae 3-jointed. 



i. Joints of club of antenna; of equal breadth SlLTANUS, Latr. 



ii. Central joint of club ol antennae broader than the other 

 two . CATHAKTUS, Seiche. 



