Placiisa.] STAPiirLi^ciD.E, KU 



of hind l)0(1y lirownish, very finely puucture'l ttwl pubesceiil ; antennae 

 reddish brown with the base testaceous, with joints 5-10 strongly 

 transverse; thorax broader tlian long, fully as broad at base as elytra, 

 with base sinuate near posterior angles; elytra longer than thorax, 

 depressed ; hind body closely punctured, posterior segments a little 

 smoother and more shining, with punctuation not so close ; legs testaceous, 

 posterior femora sometimes darker. L. 2 mm. 



Male with the seventh segment of hind l:)od3' furnished with a tubercle on 

 disc, and three tubercles or blunt teeth at apex, of which the central one is 

 most conspicuous, and the lateral ones a])pear to be sometimes absent ; 

 on each side the segment is terminated by a long slender spine, slightly 

 curving inwards : the male characters, however, of this species appear to 

 vary somewhat, and on these variations have been founded other species. 



Under bark, and also at fresh sap of various trees, beech, fir, onk, &c. ; not uncoinuion ; 

 Riehmoud Park, Asbtead, Micklebam, Caterbam, Tdgate Forest, Higligate, Lee, 

 Tonbridge; Cannock Cbase ; Bowdky Forest; Sherwood Forest; Scotland, under 

 bark of dead trees, Tweed, Forth, 'lay, and Dee districts. 



P. complanata, Er. I-arger than the preceding, and distinguished 

 by having the intermediate joints of the antennae not strongly transverse, 

 and longer in proportion to the following joints; the general colour is 

 didler, and the elytra as a rule darker ; the posterior angles of the thorax 

 are a little more blunt ; the male characters appear to differ very little 

 from some forms o{ P. immilio, three tubercles, however, being always 

 present on the apex of hind margin. L. 2\ mm. 



This species was introduced as British by Crotch many years ago, 

 but Avas afterwards dropped : there are, however, specimens from 

 Braemar, Rannoch, and Pai.sley in Mr. Rye's collection, and others that 

 appear to belong to it. 



P. infima, Er. Islove shining than either of the two preceding, 

 pitchy black with the elytra brownish ; antennae ferruginous or fuscous 

 with base lighter, with joints 5-10 transverse, more strongly so in the 

 female than in the male ; thorax much broader than long, a little 

 narrower than elytra, very finely and thickly punctured, sinuate on each 

 side near posterior angles, which are right angles ; elytra widened behind, 

 longer and less closely punctured than thorax ; hind body finely and 

 closely punctured throughout ; legs clear testaceous. L. 2 mm. 



Male with the seventh segment of hind body terminated on each side 

 by a slender spine, the apex between these furnished Avith four short 

 even tuberculiform teeth, and the disc of the segment having on its 

 upper surface two small tubercles, placed transversely. 



Under bark ; rare; Shirley, Weybridge, West Wickham, Addington ( Cossw fcreeslj 

 Repton, near Burton-on-Trent ; Chat Moss ; Northumberland district, rare, Gosfortb . 



P. denticulata, Sharp. This species appears to be considered a 

 variety of the preceding by some authoiities, but it is less depressed than 



VOL. II. M 



