1S6 MANDIBUI.ATA. COLliOl'TKKA. 



elytra ample, also immaculate : abtlomen nearly twice as long as the elytra, 



entirely pale testaceous, furnished with a few hairs: legs the same; 



antcnnw with the base testaceous, the apex, which is slightly incrassated, 



black. 



Taken near London. 



Sp. 37. dimidiatus. Ater ni/idus, thoracis viargiiie posiico, e!i/iris, abdominis 

 segmentorum mar^rinihus pedibiisquc tcstaceis. (Long. corp. Ig lin.) 



Oxy. dimidiatus. Fabricius.—Ta. dimidiatus. Stcph. CatuL 272. No. 2842. 



Black, very shining and smooth, glabrous : head subtriangular : thorax short, 

 with the posterior angles broadly rufous : elytra elongate, testaceous, with the 

 base within slightly dusky : abdomen pilosulous, with the margins of the 

 segments reddish : legs testaceous : antennse as long as the thorax, slightly 

 thickened exteriorly, black, with the base ferruginous. 



Found occasionally within the metropolitan district, but more 

 frequently in Norfolk: it also occurs in Suffolk. "Cramond." — 

 Rev, W. Little. 



Sp. 38. macropterus. Niger, nitidus, thoracis margine postico pedibusque 

 testaceis, elytris elongatis, piceis, limbo rufo. (Long. corp. !§ lin.) 



Ta. macropterus. Steph. Catal. 272. No. 2843. 



Black, shining, smooth, and glabrous : head subtriangular : thorax with the 

 hinder margins testaceous : elytra elongate, piceous, with the margins entirely 

 rufous : abdomen black, strongly margined, and slightly pilose : legs testa- 

 ceous : antennse somewhat hicrassated at the apex, and dusky, the base 

 testaceous. 



Occasionally taken within the metropolitan district. 



b. Antennae nodose, clothed with verticillate hairs. 



Sp. 39. nodicornis. Niger, nitidus, pedibus rufis, antennis nodosis tenuissimis 



verticillato-pilosis. (Long. corp. If lin.) 

 Ta. nodicornis. Kirby MSS.—Steph. Catal. 272. No. 2844. 



Pitchy-black, shining, very smooth, and glabrous : head triangular-orbicu- 

 late : thorax transverse, margined entirely, truncate posteriorly, and very 

 glossy : elytra longer and wider than the thorax, very glossy : abdomen 

 narrower than the elytra, above twice as long, slender towards the apex, 

 which last is slightly rufescent and pilose : legs rufous : aniennce nearlj as 

 long as the thorax, rufescent, very slender, with whorls of hair, the two 

 basal joints much thicker than the remainder, the rest with the apex incras- 

 sate: palpi rufous, with the penultimate joint black, obconic, large: mouth 

 rufous; eyes prominent. 



Allied to (but apparently different from) Tach. capillicornis of Graven- 



