276 Rev. T. A. Marshall's monograph of 



8. Microdiis rufiidosiis, Nees. 



Microdus ruqidosus, Nees, Mon., i., 148, ? ; Reinb., 

 Berl. ent. Zeit., 1867, p. 357, S 2 . 



Black ; palpi fuscous, the maxillary rufous at the tips ; anterior 

 femora and tibiae rufous ; basal half of hind tibias white with a 

 fuscous ring, the other half black ; spurs white ; hind tarsi black, 

 white at the extreme base. Wings infumated. Segments 1 — 3 

 punctulato-rugulose, 2 — 3 in the middle transversely impressed ; 

 the other segments smooth and shining. Second cubital areolet 

 sessile. Terebra as long as the body without the head. S ? • 

 Length, 2 lin. 



Var. Anterior coxae and hind femora rufous, the latter tip^jed 

 with black ; segment 2 rufescent at the base. 



Introduced as British on the authority of Curtis, Guide, 

 2d ed., column 116; no specimens being at band. The 

 description is from Nees and Eeinhard. According to 

 Nees it differs from cingidipes in the rugulosit}^ of the 

 abdomen, and the form of the 2d cubital areolet. Seg- 

 ment 1 rimuloso-striate ; 2—3 punctulato-rugulose and 

 dull, each with a straight transverse medial depression ; 

 3 on the hind margin, and all the following, smooth and 

 shining. Eeinhard says the terebra is as long as the 

 body. Coxae and upper trochanters black, the lower 

 rufous. Anterior legs rufous, their femora narrowly 

 black at the base. 



One 2 was taken by Nees v. Esenbeck at Sickers- 

 hausen. Subsequently, according to Eeinhard, obtained 

 at Hambach by Eichhoff, in July, from bark at the roots 

 of oaks, together with Bostrychus rillosiis, Fab. ; and by 

 Von Heyden from rotten wood in forests, and on the 

 trunks of oaks. 



9. Microdus mediator, Nees. 



Microdus mediator, Nees, Mon., i., 146; Eeinh., Berl. 

 ent. Zeit., 1867, p. 357, ? . 



Black ; palpi concolorous; femora and tibi« rufo-testaceous, hind 

 tibiae with a ring near the base, and the apex, blackish ; tarsi fus- 

 cous. Wings infumated, sqixamulae black, nerviu-es and stigma 

 fuscous. Antenme 29-jointcd. Metathorax finely reticulato-rugu- 

 lose, with 2 longitudinal cariute. Segment 1 rugulose, 2, and 3 at 

 the base, minutely rimulose, more punctulate at the sides ; the rest 

 smooth and shining ; segment 2 distinctly shorter than broad, and 

 with a medial transverse depression, more faintly repeated on the 



