72 MEMOIRS ON THE COLEOPTERA. 



converging and almost straight from near the apex to the base; elytra parallel, 

 as long as wide, very much longer than the prothorax; abdomen narrower 

 than the elytra, perfectly parallel, with straight sides, the tergites equal in 

 length, the sixth (cf) with the median part of the apex broadly and feebly 

 arcuate, becoming very feebly sinuate medially, this short broad median 

 lobe narrowly separated at each side from a less posterior, small but strong 

 tubercle marking each side of the apex, the sixth ventral plate ogival at tip, 

 the angle at the apex distinct and not blunt. Length 2.6 mm.; width 0.68 

 mm. California (San Francisco). 



I obtained of this interesting species only a single rather immature 

 example. 



Paradilacra Bernh. 



The body is stout to moderately slender, somewhat convex, the 

 lustre dull because of the extremely fine dense punctures and micro- 

 reticulation, this sculpture covering also the entire abdomen in a 

 way wholly foreign to any modification of Atheta, so that Paradilacra 

 should be considered a distinct genus, or more correctly a subgenus 

 of the genus Dilacra, related to Atheta in the structure of the sterna 

 and slightly separated coxae and in having the hypomera visible 

 from the sides in their entirety. There is no vestige of infra-lateral 

 carinae and the basal joint of the slender hind tarsi is much longer 

 than the second. 



I have applied this name Paradilacra to the following species, 

 although they differ from the type, named densissima by Bernhauer, 

 in having the eyes notably small in size, the elytra shorter and the 

 first three tergites impressed at base, the third almost as strongly 

 as the first two. The tarsi in Paradilacra densissima are not de- 

 scribed. 



Paradilacra persola n. sp. Only moderately slender, deep black throughout, 

 the antennae, legs and palpi scarcely less black, the tarsi paler; pubescence 

 very short, fine, dusky; head barely wider than long, the eyes moderately 

 convex, at rather more than their own length from the base, the tempora 

 parallel, broadly rounded and barely perceptibly fuller than the eyes; an- 

 tennae only moderate in length, very slender, barely visibly incrassate, the 

 outer joints nearly as long as wide, the last obtuse at apex and not as long 

 as the two preceding, the second and third elongate, the former distinctly 

 the longer; prothorax rather large and convex, moderately transverse, much 

 wider than the head and evidently narrower than the elytra, widest, with 

 the sides broadly rounded, at about apical third, thence slightly and subrecti- 

 linearly narrowed to the base, impressed at the middle at base; elytra moder- 

 ately transverse, the suture strongly impressed basally, only very little 

 longer than the prothorax; abdomen narrower than the elytra, parallel, 



