HARPALID^. — OMASEUS. 113 



and amongst them Ca. aterrimus, Fab., was improperly introduced, 

 and the characters of the genus have been drawn from that insect, 

 which thus became the type : and were it not from a disinclination 

 to multiply generic names, I should have separated the former 

 species, as hinted in page 68 ; however, I shall merely divide the 

 Omasei into sections, as it is evident that the first step towards the 

 advancement of science is analysis, synthesis being useful only in 

 combining those facts which are made known by analysis ; for 

 without the latter, it tends rather to promote and perpetuate error 

 than to elicit truth. 



A. Thorax rounded behind, margins slightly incrassated ; mandibles not striated 

 above : body convex. 



Sp. 1. aterrimus. Niger politus, elytris striatis, foveis tribus prqfundis disci 



impressis. (Long. corp. 7 lin.) 

 Ca. aterrimus. Fabricius. — Om. aterrimus. Curtis, i. pi. 15. — Steph. Catal. 



p. 23. No. 186. 



Glossy black : head with a deep fovea on each side between the eyes : thorax 

 broadly margined, slightly attenuated posteriorly; the angles obtuse, disc 

 above convex, very smooth glossy black, with a deep subpunctated rounded 

 fovea on each side at the base, and a strong dorsal channel : elytra broader 

 than the thorax, rather convex, striated, the stris punctated, with three very 

 deep impressions on the disc; the posterior remote, and an interrupted series 

 on the margin : body beneath, palpi, antennae, and legs black : tarsi with 

 rufescent cilia. 



Found at Horning, in Norfolk ; on the borders of Whittlesea- 

 mere ; and also near Cork, in Ireland, whence I received several 

 specimens from Mr. Drummond. " In 1826 abundantly in Bot- 

 tisham-fen ; first in April, and then again in June, basking in the 

 sun, on the soft mud, at the edge of the turf-pits.*" — Rev. L. Jenyns. 



B. Thorax with the hinder angles acute, margins incrassated ; mandibles striated ; 

 body depressed. 



a. With wings. 

 Sp. 2. Bulwerii. Plate VII. f. 2. — JEneo-niger, elytris striatis, foveis quinque 



disci impressis. (Long. corp. 4 — 5 lin.) 

 Om. Bulwerii mihi.— Steph. Catal. p. 23. No. 187. 



Above of a deep glossy bronzed black : head very smooth, impunctate, Avith a 

 deep impression on each side near the base of the antennae : thorax sub- 

 cordate, obsoletely wrinkled transversely, the base sparingly punctate, with a 

 deep rugose fovea at each angle, having a longitudinal impression: elytra 

 striated, the striae punctate, with five foveae irregularly placed between the 

 second and tliird striae from the suture, the first rather remote ; near the apex 

 of the elytra, towards the margin, is another fovea; and on the margin itself 



