.] BHTXCHOPHORA. 439 



both sides and is not hairy at apex ; the funiculus is much shorter 

 than the club ; the mentum is oblong quadrate and the submentum 

 ,is not visible; the tibiae are straight and sublinear with the apex 

 obliquely truncate ; in Dryoctetes the club of the antennae is truncate, 

 being truncate at apex with the basal joint corneous and the remaining 

 joints lying within it ; the flat sxirface at apex is set with bristles ; the 

 funiculus is as long as the club ; the mentum is broadly cordate and the 

 snbmentnm is large and concave anteriorly ; the tibia? are spathulate 

 with the apex rounded. The genus contains the species T. licolor and 

 T. villifrons ; T. Bulmerincqui may be identical with T. bicolor, but is 

 probably distinct ; it has been represented as synonymous with both 

 the last-mentioned species. 



T. bicolor, Herbst. (fuscug, Marsh.? Eulmerincqui, J\ol. ?), 

 Elongate, cylindrical, pitch black or brown, with rather scanty and 

 moderately long whitish grey hairs ; antennae and legs pale yellow 

 brown ; thorax longer than broad, with the anterior half rather strongly 

 granulate, especially in front, hinder portion very closely punctured, 

 sides slightly rounded from base to apex; elytra with distinct and 

 rather strongly punctured striae, smooth and without tubercular 

 asperities at apex, which in the male is reflexed and raised at the 

 suture. L. 2-2| mm. 



In decaying oaks; very rare; Down , near Beckenham, Kent (Crotch); Darenth 

 Wood (Champion); the Tomicus fuscus of Marsham (with which this insect has 

 been, by some authors, identified), is recorded by Stephens as from the London 

 district, Devonshire, Cornwall and Swansea, but Stephens' insect does not appear to 

 be really the same as Marsliam's, and cannot be referred to the present species. Mr. 

 Waterhouse seems to he of opinion that the T. fuscus of Marsham may be Xylocleptes 

 Ihpinus, and a part, at all events, of Stephens' T. fuscus are nothing but Pityogenes 

 lidentatus (Tomveus bidens). 



TOMICUS, Latreille (Ips, De Geer ; fiosfrychvs, Herbst.). 



This genus, regarded as including Pityogenes, which has only recently 

 been separated off by Bedel, contains about sixty species which are 

 u-idely distributed in Europe, Asia, North, Central and South America, 

 the Australian region, &c. ; they may be easily distinguished from 

 Dryocat'* by having the elytra excavate at apex and from Pityogenes 

 by the fact that the prosternum is furnished with a sharp and distinct 

 angular process between the anterior coxae ; the species appear to attack 

 exclusively pines and other Coniferae and sometimes do considerable 

 damage on the continent ; the ravages of T. typography^ have been 

 before alluded to (r. he larvae of Tomiciis are formed as in Scaly* 



his and Hyksinuf, but the pupae of the first-mentioned genus are 

 terminated by two spines, whereas in the two latter the apex is simple; 

 the parent beetles lay their eggs in a central gallery and the larvae eat 

 galleries at right angles to this, forming strongly marked patterns which 

 have earned for them the name of " typographers." 



Many species of Tomicvg are polygamous, and by these instead of the 



