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IV. Descriptio7is of the British Species of the Genus 

 Euplectus {Family Pselaphidse). By G. R. Water- 

 house, Esq., V.-P. Z. S., &c. 



[ReadJan. 7lh, 1861.] 



Of the insects which until somewhat recently came under the head 

 Eupleclus, I am acquainted with ten British species. Two of 

 these are now separated to form distinct genera, viz., Eupl. Mar- 

 Icelii of Aube's " Revision de la Famille ties Pstluphiens," published 

 in the Ann. Soc. Ent. de France, 2me Ser., ii. p. 142, formerly 

 supposed by M. Aube to be the Pselaphus sulcicolUs of Reichen- 

 bach, which latter is, however, a much larger insect, more densely 

 clothed with (shorter) pubescence, and more densely punctured, 

 and hence is destitute of gloss, or nearly so. Of the E. Markelii 

 are three specimens in Mr, Stephens's collection, where they 

 stand, with other insects, to represent the Bryaxis hcematiciis. 

 It is no doubt the same insect which Mr. Curtis describes (vol, vii. 

 pi. 315) as Bryaxis sulcicolUs. The insect now forms part of the 

 genus Tiichonyx, established by Chaudoir. 



The second species which has, in modern times, been removed 

 from the genus Euplectus, is the E. brevicornis of Denny = Psela- 

 phus brevicornis of Reichenbach, which now forms part of Aube's 

 genus Trimmium. This insect appears to be rare with us. I 

 have found but two specimens; one of these was taken at the root 

 of an oak tree in Bishop's Wood, Hampstead ; of the other the 

 locality is not noted. 



- Of the genus Euplectus, as now restricted, the British species 

 may be divided into three sections ; and, indeed, are so divided 

 by Aube. 



Sect. 1. Thorax with a discoidal fovea, and three fovece behind, the 

 latter united by a transverse groove. 



1. Euplectus Kunzei, Aube, Ann. de la Soc. Ent. de France, 2me 

 Serie, ii. p. 143, sp. 3. 1844. 



Moderately elongate, and more depressed than the following 

 species ; nifo-testaceous, and finely pubescent. Head decidedly 

 broader than the thorax ; gradually rounded behind the eyes, 

 which are small ; the sides and back part punctured ; the pos- 

 terior foveae large, somewhat shallow, and punctured ; detached 

 from the strong transverse anterior groove ; the raised area be- 

 hind narrow, and with a distinct fovea on the vertex. Antennae 



