442 RUTNCHOPHORA. [Tomicus. 



Forest; Liverpool district; Dunham Pnrk and Dukinfield, Manchester district 

 (Chappeli) ; Scotland, Forth and, Dee districts; the species extends to Siberia. 



T. nigritus, Gyll. (suturalis, Gyll. $ ). Very closely allied to the 

 preceding from which it differs in being, on an average, slightly smaller, 

 with the pilose pubescence white, and the punctured stria? of the elytra 

 less strong, and also by having the posterior excavation less extensive, 

 more obsoletely punctured, and less strongly denticulated at the sides, 

 and the club of the antennae subtruncate at apex instead of rounded, 

 with the divisions of the joints curved instead of straight. The female 

 has the posterior excavation of the elytra denticulated at the sides, with 

 three larger sharp teeth, whilst in the male the apex is pitchy red and 

 the sides of the excavation are crenulate and the teeth are smaller. 

 L. 4 mm. 



Under bark of Coniferao (firs, pines, &c.) ; very rare ; Scotland, Moray district, 

 Strath Glass, Inverness-shire (Sharp) ; Mr. Chappeli also records it from Dukinfield 

 in the Manchester district, but this may be in error. 



It is very possible that T. amitinus, Eich. (xylographus, Redt.) may 

 be found mixed with T, typography* in British collections ; it may be 

 distinguished by its smaller size (4-4 1 mm.) and the following 

 characters : thorax more narrowed in front, dorsal interstices of the 

 elytra flat and somewhat rugose with a distinct row of punctures ; 

 apical concavity of elytra shiny with scattered rugose punctures : in 

 T. typographus the dorsal interstices of the elytra are convex smooth 

 and impunctate ; the last-mentioned insect is more attached to the pine 

 than T. amitinns which is, as a rule, a spruce feeder. 



PITYOGENES, Bedel. 



This new genus contains three species only, which are separated from 

 Tomicus by the fact that the prosterrmm has no intercoxal process, and 

 that the females have a deep impression at the apex of the elytra near 

 suture ; in the males only the apex is excavate and is furnished with 

 strong teeth ; the tibiie are linear and have no furrows for the reception 

 of the tarsi, a point that will distinguish them from Xyleltorus, while 

 from Xylocleptes they may be known by the distinct scutellum and the 

 shape of the second joint of the antenna ; they appear to be somewhat 

 closely allied to PityopJithorus and have been included under that genus 

 by several authors, but the absence of an intercoxal process to the pro- 

 sternum and of a basal border to the thorax will serve to -separate them. 



I. Sides of elytra smooth behind ; male with the in- 

 ternal margin of each elytron armed behind Avith 

 three equidistant teeth ; forehead of female with a 



deep impression P. CHALCOGRAPHrs, L. 



II. Sides of elytra punctured to apex ; forehead of 

 female always convex. 



i. Body behind thorax twice as long as broad; 



