68 MEMOIRS ON THE COLEOPTERA. 



in the small and obtrapezoidal prothorax, duller lustre and sternal 

 characters. The head is devoid of any trace of infra-lateral carinse. 

 The type is the first species described below : 



Atheta (Adota) massettensis n. sp. Somewhat depressed and alutaceous 

 in lustre, the micro-reticulation dense and strong, feebler on the more shining 

 abdomen, the punctures very fine, close-set and indistinct, the pubescence 

 short but rather coarse, dark cinereous; color deep black throughout, the 

 elytra scarcely visibly picescent, the legs rufo-piceous; head but slightly 

 transverse, parallel, the eyes rather prominent but at much more than their 

 own length from the base, the tempora about similarly prominent, parallel, 

 very feebly arcuate, broadly rounding at base; antennae rather long and slen- 

 der, black throughout, scarcely visibly incrassate, the outer joints nearly as 

 long as wide, the last not as long as the two preceding, the second and third 

 elongate, subequal in length, the former the thicker and more obconic; pro- 

 thorax slightly transverse and a little wider than the head, subtruncate at 

 apex, strongly rounded at base, the sides converging from apex to base, nearly 

 straight medially, the surface nearly flat except laterally; elytra large, 

 parallel, as long as wide, very much wider and longer than the prothorax; 

 abdomen much narrower than the elytra, parallel throughout, the fourth 

 and fifth tergites subequal, the sixth (cf) arcuato-truncate at tip, with a 

 small elevated tubercle at each lateral angle and two very short, feeble and 

 blunt tumid median projections, mutually nearly twice as distant as either 

 from the lateral tubercle; mesosternal process extending to apical third 

 of the coxae, gradually acutely angulate but not aciculate at tip and only 

 moderately distant from the very acutely angulate and long metasternal 

 projection, the intervening space very deeply excavated; hind tarsi moder- 

 ately long, the basal joint slightly longer than the second, two to four equal 

 and together equaling the fifth. Length 2.7 mm.; width 0.7 mm. Queen 

 Charlotte Islands (Massett), J. H. Keen. 



This species does not appear to be closely allied to any of those 

 described by Mannerheim or Maklin. 



Atheta (Adota) subintima n. sp. Closely allied to the preceding but smaller 

 and rather more slender, the coloration, sculpture and vestiture similar; 

 head narrower, the central impression more elongate, the tempora somewhat 

 more swollen; prothorax shorter, nearly similar but more transverse, with 

 the sides more rounded anteriorly, becoming convergent and nearly straight 

 from only slightly before the middle to the base; elytra and abdomen nearly 

 similar but narrower, the male sexual characters also similar, except that the 

 two median projections are nearly flat and not so dorsally swollen as in 

 massettensis. Length 2.55 mm.; width 0.6 mm. British Columbia (Met- 

 lakatla), Keen. 



This might possibly be regarded as a subspecies of the preceding, 

 but it is constantly smaller and narrower, and the characters relating 

 to the head and prothorax also seem to be constant. Both forms 

 are represented by good series. 



