446 RHYNCHOPHORA. [Trypodewlror. . 



taken by Mr. Matthews, Mr. Blatch, myself and others ; I have records from Scotland, 

 but they probably apply to the nest species, and I have also a record from the 

 Manchester district for T. lineatufn, which must most probably be referred to this 

 species. 



T. lineatum, 01. Very closely allied to the preceding, with 

 which it has been often confused, as it strongly resembles it in colour 

 and general appearance ; it is, however, smaller and may be known by 

 the shape of the club of the antenna?, which is rounded on both sides 

 and at apex ; the sculpture of the thorax is very much finer, the anterior 

 tubercles being much smaller and more depressed, and the pubescence is 

 more scanty and shorter ; the punctures of the s trite on the elytra are 

 finer, the interstices are not rugose (in T. quercus they are finely 

 wrinkled), and the general lincation is less dark and less defined. L 

 2|-3 mm. 



In bark of fir logs; not common, or rather very local ; . Scotland, Tay and Dee 

 districts (Bracmar and Raunoch). 



XYLEBORUS, Eichhoff. 



This genus contains about seventy or eighty species which aro very 

 widely distributed throughout the greater part of the world, representa- 

 tives occurring in Europe, Asia, North, Central and South America, 

 South Africa, the Australian region, Tahiti, &c. ; they vary consider- 

 ably in general appearance and are in many cases remarkable for the, 

 great difference in the sexes ; this is very noticeable in X. <H*par as its 

 name implies; about nine species occur in Europe, of which three are 

 found in Britain ; the males are by far the scarcer of the two sexes and, as a 

 rule, are comparatively seldom met with ; the species are usually supposed 

 to bore galleries into the sap wood of the trees they are attached to, but 

 some of them inhabit various trees ; Mr. Blandford has kindly sent mo 

 the following note on the genus : 



" The species do not merely live in the sapwood but burrow deeply 

 into the tree ; certain exotic ones follow the habits of Anobiidtc and live 

 in such various substances as sugar-cane, corks, bamboos, &c. I have 

 specimens of X. perforans ("Woll.). from sugar-cane and cacao tree, and 

 Wollaston has found it in corks, the stems of Jatrophca, &c. 



" The males do not leave the spot where they are bred and where they 

 impregnate the females; the small assemblages of males sometimes found 

 are widowers whose wives have deserted them. The males are much 

 rarer than the females; in sugar-cane from S. Vincent I have found 

 between two and three hundred examples of X. perfurans among which 

 was one solitary male ; and Mr. T\ r aterhouse has found much the same in 

 the same species." 



The chief characters of the genus are as follows : tibiae broad, 

 more or less serrate and furnished with furrows for the reception of the 

 tarsi which are rather short ; prosternurn excised as far as the coxa3 and 



