224 [October, 



a. — Tliorax not alii(,;iceous. 



Size Ij to Sj mm P. hi/bridus, Flacli (v. cotifasus, Giiill.)- 



For details see Flach's diagnosis. 

 aa. — Tliorax similarly alutaceous to elytra. 



b. — Last joint of antonnse slender, neai-ly three times as long as broad ; 

 form of body broader and more convex; aiutation finer; 

 punctuation of interstices of, elytra not in rows. 1| to 3 mm... 



P. corruscu.1, Pz. 

 bh. — Last joint of antennro stout, about twice as long as broad ; form 

 of body narrow elliptical, less convex ; aiutation coarser; 

 interstices of elytra with rows of punctures. \{ lo 2 mm.... 



P. caricis, Sturm. 

 II.— Elytra not alutaceous, except sometimes at extreme apex , dorsal inter- 

 stices with a single row of large jninctures on the inner side of each 



stria ; thorax not alutaceous. 1^ to 1| mm P. substriatus, Gyll- 



AA. — Thorax not bordered in front of scutellum. 



(Thorax not alutaceous ; elytra feebly so). 

 c. — Form short, broad, and convex ; legs and antennre sometimes reddish. 



2 mm /'. champion}, Guill. 



brunnipes, Rye, nee. Bris. 

 cc. — Form longish oval, somewhat narrowed behind, resembling Olibrus 

 Jlavicornis, Sturm. 2^ to 3 mm \_P. brunnipes, Bris.]. 



Plmlocruf! Iri/hridus, Flach. The following is Flach's diap;nosis : — 



Potundato-ova/is, Phal. grossi fere statura, inter hunc et P. corruscus intermeditis, 

 thorace sat denne sultiliter punctulafo, ititerstitiis glabrix, stria marginali posteriore 

 media distincta, lateribus dejiciente ; elytris retrorsum vix angustatus, subtiliter 

 reticulatis ; strisc seriesque dorsales subtilissimw ; interstitio suturali fiaud elexiato, 

 serie punctorum 4 — 5 majorum, ceteris vage obsolete punctulatis ; antennarum clava 

 articulo 11 priecedentibus duobus longiore, suam latitudinem diipJo longitndine 

 superante. Long. 3 — 4 mm Patr. Transsylvania. 



] am unable to say with any certainty whether our insect is the 

 van. confusus, Guill., or not, owing to M, Guillebeau's vague and 

 indefinite description ; but confasns being a common French form, it 

 would seem to be most probable. It appears to be chiefly a coast 

 species here, Deal, Sandwich, I>ognor, Southend, Erith, Felixstowe, 

 Sheppey. There are two specimens in the Power Collection labelled 

 " Lewisham." 



P. corruscus, Pz. — The differences between this common and 

 widely distributed species are so well indicated in the above diagnosis 

 of liyhridus that nothing more is needed. Like the latter species, or 

 at all events the var. confusus, it varies extremely in size, and as small 

 narrow specimens are liable to be taken for caricis, I have given 

 several points of distinction in the table. P. humherti, Rye, and 

 hrisouti, Kye. appear to be forms of this species. 



