158 Dr. Sharp's Revision of the 



suborbiculatOj medio canalicula brevi impresso; tliorace 

 transversim subquadrato^ basin versus vix angustato ; ely- 

 tris thorace paulo longioribus ; abdomine supra segmentis 

 2-4 subtiliter sat crebre punctatis, 5° parce punctato, 

 6° fere Ifevigato. Long. 1^ lin. 



31as ; abdomine segmento 7° ventrali producto_, apicem 

 versus angustato^ apice rotundato. 



Allied to H. dehilis, but less depressed, more robust, 

 jieither so shining nor so brightly coloured, witli nar- 

 rower more orbiculate head, shorter elytra, different ab- 

 dominal structure in the male, &c. Antennas a little longer 

 than the head and thorax, obscure testaceous, the basal 

 joints testaceous; a little thickened towards the apex; 

 joints one to three moderately long, three not so long as 

 two, four to ten each slightly broader than its predecessor, 

 four to six about as long as broad, seven to ten scarcely 

 so long as broad; eleventh joint short, scarcely half as 

 long again as the tenth. Mandibles and palpi obscure 

 yellow. Head considerably narrower than the thorax, 

 a little narrowed in front, with a distinct short channel 

 on the disc, finely and indistinctly punctured. Thorax a 

 little narrower than the elytra, quite one-third broader 

 than long, transversely convex, but little narrowed be- 

 hind, with a scarcely visible impression in front of the 

 base in the middle, finely and closely punctured. Elytra 

 scarcely one-fourth longer than the thorax, broader than 

 long, thickly and finely punctured, brownish or pitchy- 

 brown. Abdomen black, with the apex yellowish, seg- 

 ments two to four moderately closely and finely punc- 

 tured, fifth segment sparingly punctured, sixth nearly 

 impunctate. Legs yellow. 



In the male, the channel on the head is more distinct, 

 the ventral plate of the seventh abdominal segment is 

 distinctly produced beyond the dorsal plate, and it is 

 narrowed towards the hind margin, which is rounded. 



Rare. I have found it only in Scotland; Rannoch, 

 and Thornhill, 



Ohs. — This species resembles some of the varieties of 

 H. volans, but is readily distinguished by its shorter and 

 stouter antennae, with transverse penultimate joints. It 

 also somewhat resembles H. Auhei, Bris., and is distin- 

 guished by its shorter antennte, less punctured abdomen, 

 &c. Its place is certainly next H. dehilis. 



