HARPALID^. STENOLOPHUS. 165 



Genus LIX. — Stenolophus, Ziegler. 



Palpi, external maxillary with the terminal joint ovate-acuminate, truncate, 

 longer than the preceding, which is clavate; internal ■vii\h the last joint arj 

 long again as the first, and very slender, acute : luhial with the two last joints 

 of equal length, the terminal ovate, truncate : lahrum transverse, entire : man- 

 dibles acute, obsoletely crenated at the base : maxillcB acute, elongate : mentiim, 

 transverse, deeply and simply emarginate. Antennce with the two basal joints 

 naked : head ovate : tliorax suborbicular, the hinder angles rounded : elytra 

 sinuate-tnmcate at the apex : wings two : anterior and intermediate tarsi of 

 males with dilated joints. 



Stenolophus diifers from Harpalus by having the notch of the 

 mentum nearly simple, as in Trechus, but from the latter genus it 

 may be known by its truncate palpi ; it may also be distinguished 

 with facility from Ophonus by the body being naked and impunc- 

 tate, and from Harpalus by its suborbicular thorax. 



The species of this genus usually frequent wet and marshy situa- 

 tions in gravelly districts, and are mostly very local. 



Sp. 1. vaporariorum. Plate IX. f. 2. — Niger, thorace, elytrorum basi, anten- 

 • narum. articulis duahus basalibus pedibusque testaceis. (Long. corp. 2.} — 3^ lin.) 



Ca. vaporariorum. Fabricius. — St. vaporariorum. Steph. Catal. p. 33. No. 314. 



Above with the head black, smooth : thorax rufous, slightly convex, with a mo- 

 derate dorsal line, and a foveola on each side at the base : elytra with the base 

 and margin pale testaceous, and a large patch of black occupying more than 

 the posterior half, simply striated, the interstices smooth, with a few impres- 

 sions towards the apex of the outer stria : beneath the head and abdomen are 

 black : the thorax, legs, palpi, and the two basal joints of the antennte pale 

 testaceous, the remaining joints fuscous : the anterior margin of the thorax is 

 sometimes black. 



Linnjeus has evidently confounded different insects together, under the above 

 name, in his Systema Naturce and Fauna Suecica: the insect thus called in 

 the former work is supposed by Gyllenhal (whose residence in Sweden gives 

 him a better opportunity of deciding the point than other naturalists) to be 

 the Tarus basalis, subsequently described, while the other description is evi- 

 dently synonymous with that of Tr. dorsalis. It however appears, by a me- 

 morandum of Mr. Kirby's, that the insect in the Linnean cabinet, called Ca. 

 vaporariorum, is the same as the above. 



Taken in Battersea-fields, but rarely. " Gravelly banks of ponds, 

 Wandsworth common, in February, March, and April." — Mr. 

 Ingpen. " Fakenham, Norfolk." — Rev. T. Skrimsliire. " Bromp- 

 ton, near the canal." — Mr. Waterhoiise. 



Mandibulata, Vol. I. 30th June, 1828. y 



