.'] HETEROMERA. 91 



" The rarity of these insects is well known ; they require special working 

 for, and are not often obtained by chance collecting. So far as my own 

 observations go, they are chiefly found in oak-woods at elevations of 

 from 3000 to 8000 feet ; a considerable number of those collected by my- 

 self were beaten from the decaying branches of oak." The earlier stages 

 of the Xylophili are apparently passed in rotten wood. 



I. Antennae with the second and third joints small, 

 transverse, about eqnal in length ; eyes nearly 



reaching posterior margin of head X. poPULNErs, F. 



(pygmceus, De G., nee Muls.) 

 II. Antennae with the third joint plainly longer 



than second, especially in the male. 

 i. Kyes scarcely emarginate, separated by a 

 distinct interval from posterior margin of head ; 



thorax about as long as broad X. XEGLECTT/S, Duv. 



ii. Eyes plainly emargvnate, nearly reaching pos- 

 terior margin of head ; thorax broader than 



long X. OCCLATTTS, Gyll. 



(pygmeeus, Muls., nee De G.) 



X. populneus, F. (pygmrw.is, De G., nee. Muls. ; boleti, Marsh.). 

 Testaceous with the head and abdomen fuscous, dull, obsoletely punctured, 

 clothed with rather thin pale pubescence, with a patch towards base of 

 elytra and a fascia about middle more or less denuded : head with 

 eyes as broad as or a little broader than front of thorax ; antennas 

 varying in the sexes ; thorax transverse, usually with a curved impression 

 at base ; elytra much broader at base than thorax, with the shoulders 

 well marked, subparailel, rounded behind ; legs moderately long, 

 testaceous. L. H-2 mm. 



Male with the antennae longer than half the body, joints 4-10 plainly 

 longer than broad. 



Female with the antennae shorter than half the body, joints 4-10 sub- 

 quadrate. 



In old trees, dead hedges ; also on flowers, &c.; not common ; Dnlwich, South Lnm- 

 beth, Putney, Ripley, Stookwell, Darenth Wood, Lee, Lewisham, Finchley, WHII* 

 stead, Weybridge, Horsell, Longhton, Sheerness, Soutbend ; Birch Wood, beaten out 

 of old oaks (S. Stevens) ; Eynsham, Oxon. 



X. neglectus, Duv. (nigripejinis, Villa). Testaceous or reddish- 

 yellow, with the under-side, except prosternum, fuscous, and the elytra 

 slate-coloured, except the shoulders and hinder portions which are 

 reddish-yellow ; it may be known from X. populneus by the longer third 

 joint of the antennas and longer thorax, and by having a distinct 

 space between the eyes and the posterior margin of the head ; from A". 

 oculatus it may be separated by the two latter characters, as well as by 

 having the eyes scarcely emarginate, and also by the general colouring. 

 L. l|-2 mm. 



Old wood, &c. ; extremely rare; Wandsworth (Waterhouse) ; New Forest (two 

 specimens, Crotch, one specimen, Power) ; I believe that it has also been takt-u iu 

 the latter locality by Mr. Jauson.. 



