672 " COLKOPTERA 



punctured, with a triangular punctulate scutellum. When carefully 

 examined a few scattered yellowish hair-like scales may be seen on the 

 elytra, and greyish ones on the legs. It is just possible, however, that 

 perfect specimens may present a somewhat difterent aspect. 



The species differs from Z. deconis in being much duller, and rather 

 broader in form, &c. ; from L. piinctahis in being more attenuated 

 behind, and less coarsely sculptured. 



Length, i line^ breadth, quite \. 



I have received one broken example from J. D. Enys, Esq., F.G.S., of 

 Canterbury. 



Group— ELMID^. 



Maxillary palpi short. Antcnncc a little incrassated towards the 

 extremity, inserted near the front and inner margins of the eyes. 

 Anterior coxee sub-globular, without distinct trochanters ; the posterior 

 narrow and parallel. Abdo7nen composed of five segments. JMesothoracic 

 parapleurcB simple. 



Pachycephala. 



Nov. gen. 



Sead large, free during repose, deflexed, somewhat elongated. 

 Lahrum sub-quadrate, rounded in front, concealing the mandibles. 

 Eyes prominent, nearly round, distinctly facetted. Antennoe ii-arti- 

 culate, not quite so long as thorax, inserted near the front and inner 

 margins of the eyes ; basal joint longest, stout ; second shorter but 

 stouter than first ; joints three to ten increase in breadth ; eleventh 

 hardly broader than tenth, rounded. Terminal joints of the palpi stout. 

 Prothorax rather longer than broad, not quite as wide at the base as the 

 elytra, conical, base bi-sinuated, posterior angles prominent, acute. 

 Scutellum sub-oblong. Elytra oblong, marginated. Frosternal process 

 plane, narrow, received into the cavity of the mesosternum. Metasternum 

 moderate. Anterior coxa' prominent, sub-globular ; intermediate cylin- 

 drical; posterior lamelliform, narrowed towards the episternum. Abdo- 

 me7i composed of five segments, all free, nearly equal. Legs normal ; 

 tibicB nearly straight, not densely ciliated ; tarsi shorter than the tibiae, 

 their four basal joints about equal, the terminal stout, as long as the other 

 four taken together ; claws large, thickened at the base. 



An undoubted member of the group, but having no near affinity to 

 any of its described genera except Ancyronyx. The head, being as broad 

 as the front of the thorax, cannot be retracted within it. 



1 173- P. piceum, n.s. Body slightly convex, elongate, covered 

 with short pale yellow hairs ; shining, greenish-black ; claws castaneous. 



Read punctate, appearing rather rough and dull ; mandibles glossy, 

 reddish. Antennce pubescent, the basal joints infuscate, the others black. 

 Prothorax a little longer than broad, narrowed anteriorly, slightly con- 

 stricted near the apex, without longitudinal grooves, the middle of the 

 base depressed, with a short carina at each side of the depression ; its 

 surface is remotely and rather finely punctured, and the intervals between 

 the punctures are minutely punctulated, Scutellum narrow. Elytra 



