109J: COLEOPTERA 



I do uot know any species like this. P. sulcatissimus is repre- 

 sented (Plate 12, fig. 22, Trans. Boy. Dub. Soc, 1886) with a scutel- 

 lum. P. latitans may be nearly allied, but the description indicates 

 a distinct scutellum. The sides of the thorax in P. marginalis 

 slope rather suddenly towards the narrow rims, so that there are no 

 well-marked marginal channels. The body, when examined side- 

 ways, appears depressed towards the middle. The elytral suture 

 broad and smooth, not depressed at the base, the scutellar space is 

 extremely narrow. 



Length, 1-| lines ; breadth, quite i line. 



Boatman's. One example, from Mr. Cavell. 



1945. P. sinuatus, "■•5. Black, shining, legs and antennae 

 dark-red. 



Head similar to that of P. viarginalis. Antenna also similar. 

 Eyes minute. Thorax oblong, sides nearly straight, being only a 

 little oblique near the front ; apex with a short sinuosity near each 

 angle ; basal angles rectangular ; lateral margins narrow ; base 

 sinuous; discoidal depressions elongate, the interval narrow, basal 

 region transversely depressed ; its punctuation distinct and mode- 

 rately close. Scutellum very short, just like a portion of the broad 

 elytral basal margin. Elytra almost elongate-oval, the middle 

 widest ; punctate-striate, shoulders projecting forwards, middle of 

 base incurved ; suture broad and smooth, slightly depressed very 

 close to the scutellum, the second and fourth interstices do not 

 reach the basal margin, the third appearing convex near its junction 

 with the base, which is somewhat thicker near the middle than at 

 the sides. 



P. lateralis, P. pnhescens, and P. cognatus are more or less allied, 

 but are, nevertheless, quite distinct. The nearest species is P. 

 marginalis, from which this differs in the narrower, differently-sculp- 

 tured thorax, different elytral base and sculpture, the striae being 

 broad and deep instead of seeming to be formed of elongate inter- 

 rupted impressions. 



Length, If lines ; breadth, ^ line. 



Midhirst, near Mount Egmont. 



1946. P. impresSUS, ^^-s- Narrmc, elongate, a little shining; 

 elytra pale reddish-chestnut, distinctly yellower than other parts of 

 the body, legs and antennae included, which are quite red. 



Closely allied to P. minor : a careful comparison will show, 

 however, that this species differs in several details. 



Head longer, ocular folds more developed, frontal depressions 

 larger and deeper, wuth a slight depression extending from the hind 

 margin of one eye to the other ; eyes more distant from thorax, 

 equally large and prominent. Thorax medially incurved in front in 

 place of being truncate, anterior angles less obtuse. The general 

 outline longer and proportionally narrower. Elytra more elongate, 

 their punctures more evidently separated. Antennce with a more 

 ileveloped terminal joint. 



Length, If lines; breadth, f line. 



Hermitage, Mount Cook. Mr. H. Suter. 



