3£ 



PLATYDEBUS. 



P. riificollis is a somewhat local insect, with a very flattened appearance, 

 red thorax, and pitchy elytra, with sides nearly parallel ; the thorax has a 

 deep central furrow, with shorter furrow on each side at the base. Length 

 slightly over i inch. 



ANCHOMENUS. 



The species of the genus Anchomenus have been artificially divided (in the 

 analytical table of genera), into four groups; but as this division has been 

 based upon a character (colour) which cannot always be depended on in this 

 genus, it has been thought best to first give the names of the species which 

 fall into these groups, and then to append a short description of each species 

 without any further tabulation. 



Group 1. — Consists of those Geodephaga which have the three basal joints 

 of the anterior tarsi of the male dilated ; the elytra brilliant green or coppery ; 

 with the posterior angles of the thorax rounded - - Anchomenus mar- 

 ginatuSy A. sex-punctatus, and A, ericeti. 



Group II. — Tarsi as above ; elytra bronze, greenish bronze, or black with 

 a greenish reflection - - A. parum-punctatus, A. gracilipes, A. 4.- 

 punctatus, A. viduus, A. versutus, A, micans, and A, scitulus. 



Group III. — -Tarsi as above ; elytra red at the base with a bluish-green 

 patch on the posterior two-thirds - - A. prasinus. 



Group IV. — Tarsi as above ; elytra black or brown, with the legs slender, 

 the hinder tarsi not furrowed, and the apical joint of the palpi cylindrical - 

 A.Junceus, A. livens A. albipes, A. oblongus, A. atratus, A.piceus,A. 

 gracilis, A. fuliginosus, A. Thoreyi and A. puellus (also the var. moestus 

 of A. viduus. 



A. Junceus. — Shining black ; antennae and legs pitchy; thorax narrowed 

 behind, the sides somewhat wavy, and the posterior angles sharp right 

 angles. Length 5 to 6 lines. This species, which is common and generally 

 distributed — occurring often at the roots of trees, and often turning up at 

 sugar, is the largest of the genus, and is easily recognised by its large size 

 and shining black colour. 



1 * A* livens, — Brownish-black; antennae and legs reddish; thorax some- 

 what narrowed behind, but with the sides nearly straight, and the posterior 

 angles somewhat rounded. Length about 4 lines. Eare. 



[Erratum.— Page 21, line 7, M Lebiides " should be " Lebiida."] 



