Taphrorychus.] RHYNCHOPHORA. 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 tibie are straight and sublinear with the apex 
obliquely truncate ; in Dryocetes the club of the antenne is truncate, 
being truncate at apex with the basal joint corneous and the remaining 
joints lying within it ; the flat surface at apex is set with bristles ; the 
funiculus is as long as the club ; the mentum is broadly cordate and the 
submentum is large and concave anteriorly ; the tibia are spathulate 
with the apex rounded. The genus contains the species 7. bicolor and 
T’. villifrons ; T. Bulmerinequi may be identical with 7. bicolor, but is 
probably distinct ; it has been represented as synonymous with both 
the last-mentioned species, 
T. bicolor, Herbst. (fuscus, Marsh. ? Bulmerinequi, Kol. 2), 
Elongate, eylindrical, pitch black or brown, with rather scanty and 
moderately long whitish grey hairs; antenne 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 distinet and 
rather strongly punctured strie, smooth and without tubercular 
asperities at apex, which in the male is reflexed and raised at the 
suture, L, 2-23 mm, 
In decaying oaks ; very rare; Down, near Beckenham, Kent (Crotch); Darenth 
Wood (Champion); the Yomicus 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 Marsham’s, and cannot be referred to the present species. Mr. 
Waterhouse seems to be of opinion that the 7. fuscus of Marsham may be Xylocleptes 
bispinus, and a part, at all events, of Stephens’ 7’, JSuscus are nothing but Pityogenes 
bidentatus (Tomicus bidens). 
TOMICUS, Latreille (Ips, De Geer; Bostrychus, Herbst.). 
This genus, regarded as including Pityogenes, which has only recently 
been separated off by Bedel, contains about sixty species which are 
widely distributed in Europe, Asia, North, Central and South America, 
the Australian region, &c.; they may be easily distinguished from 
Dryocetes 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 coxe ; the Species appear to attack 
exclusively pines and other Conifere and sometimes do considerable 
damage on the continent ; the ravages of 7’. typographus have been 
before alluded to (p. 425); the larvee of Tomicus are formed as in Scoly- 
tus and Hylesinus, but the pupe 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 larve eat 
galleries at right angles to this, forming strongly marked patterns which 
have earned for them the name of “ typographers,” 
Many species of Tomicus are polygamous, and by these instead of the 
