ENGIDjE. LYCTUS. 117 



of the antennae, and other less evident characters, point out its 

 chief distinctions from Lyctus. 



Sp. 1. brunneus. Plate xviii. f. 4. Elongatus, brunneus, glaber, capite 

 thoraceque piceo-fuscis, punctulatis, elytris obsolete striatis subtilissime punctu- 

 latis. (Long. corp. 2^ lin.) 



Genus 163. parasiticus mihi. — Steph. Catal. 94. No. 1008. 



Elongate, brown, glabrous; bead piceous-brown, very delicately punctured, 

 with a transverse impression between the eyes, the latter black : thorax trun- 

 cate-cordate, pitchy-brown, thickly punctured, with a broad, shallow, longi- 

 tudinal fovea on the disc: elytra elongate, bright castaneous brown, deli- 

 cately striate ; the interstices thickly, but finely, punctured : legs and antennae 

 pitchy-ferruginous. 



Averse as I am to the changing of a name once given, without powerful reasons, 

 I am induced to do so in this instance, from a firm conviction of the impro- 

 priety of the one I originally applied. 



The only example 1 have seen was taken in July, 1826, out of a 

 wasp's nest at Dulwich. 



Genus CLXVIII. — Lyctus, Fabricius. 



Antennae nearly as long as the thorax, rather stout, pilose, the basal joint 

 robust, cylindric, the second rounded, somewhat thickened, the third to the 

 ninth short, nearly equal, the tenth very large, truncate; the eleventh also 

 large, conic. Palpi short, filiform, with the last joint arcuated : mandibles 

 exserted, with the apex bifid : head porrect, anteriorly narrow : eyes large, 

 globose : thorax subquadrate, with the lateral margins crenate, rather nar- 

 rower behind than the elytra; the latter linear, entire: body sublinear, elon- 

 gate : legs short, slender : femora rather incrassate : tibiae simple. 



Lyctus may be known from Xylotrogus by the subquadrate 

 thorax, the lateral margins of which are finely crenulated, and the 

 disc rather deeply channelled ; the body is broader and more de- 

 pressed, with the elytra pilose : — the intermediate joints of the 

 antennae are shorter and subglobose, and the terminal one acute : — 

 the species frequent dry oak wood, and delight especially in new 

 palings. 



Sp. 1. oblongus. Fusco-brunneus, opacus, pubescens, thorace dorso fovea 

 oblongd impresso, elytris convexo-cylindricis, striatim pilosis. (Long. corp. 

 11-31 lin.) 



Ips oblonga. Olivier.— Ly. oblongus. Steph. Catal. 94. No. 1006. 



Opaque, deep fuscous-brown, but variable in colour ; pubescent ; head thickly 

 rugose punctate : eyes black : thorax above moderately convex, fuscous, 



