COLEOPTERA 193 



Although at first sight extremely similar to D. pitncticeps this is really very distinct ; 

 the side-margin of the thorax is but little elevated, even at the hind angles, the thorax is 

 as broad behind as it is in front, and the anterior angles are not in the least prominent, 

 the last ventral plate is transversely wrinkled, and the punctures, or foveolae, of the 

 upper surface are larger. In addition to these characters the species is perfectly dis- 

 tinguished by the considerably shorter palpi, and the rather shorter legs. 



The dilatation of the male front tarsi is very slight though distinct, and the sexual 

 hairs on the under surface are very evident. There is in the male only one puncture on 

 each side of the middle of the last ventral plate : in the female there are two. A fine 

 series of over fifty specimens was procured by Mr Perkins, and exhibits little variation. 



Hab. Maui: Haleakala 4 — 5000ft., in March, April and October (Perkins, Nos. 

 356, 370. 382, 636. 661, 680). 



Atrachvcnemis Blackburn. 



Atrachycncinis Blackburn, Ent. Mo. Mag. xv. p. 120; Sharp, op. cit. xx. 1884, 

 p. 2 1 8. 



Though the species for which this genus was founded was assigned both by 

 Blackburn and Karsch to the sub-family Harpalidae there is now no doubt that it is an 

 Anchomenid. I have examined the structure of the elytral margins, and find that they 

 make no approach whatever to the Pterostichid structure ; the tips of the elytra are 

 closely adapted to the body, which is unusual in Anchomenides, but that is all. The 

 mandibles are very thick, and so much bent down at the tip as to be almost hooked. 



The insects of the genus are amongst the rarest of the Hawaiian Coleoptera. The 

 three species are excessively similar, and yet, if I am not deceived, differ by the fact that 

 one of them has a thoracic seta, while in the other two it is absent. They cover them- 

 selves with an exudation somewhat similar to that of Blackbitrnia (though of insignificant 

 extent compared to the e.xtraordinary coating of the latter genus), and it may be that 

 this peculiarity prevents the proper development of the seta. All the setae are very 

 small and fine, at the best, in Atrachycnojiis. In these two genera the presence or 

 absence of the seta seems to be a much less important criterion than it is in the other 

 Hawaiian Carabidae. Notwithstanding the comparatively well developed shoulders 

 the wing vestiges are very minute, as in Dcropristus. 



(i) Atrachycncniis sharpi Blackburn. 



Atrachycneniis sharpi Blackburn, Ent. Mo. Mag. xv. p. 120. 

 Anisodactylus cuneatns Karsch, Berlin. Ent. Zeitschr. xxv. p. 3, pi. i. fig. 4. 

 Plate VI. fig. 3. 



This species may be distinguished from the other two b}- the more sharply marked 

 hind angles of the thorax, as well as by the presence of a seta just in front of the angle 



