144 Trans. Acad. ScL of St. Louis. 



very sparse, forming a widely-set series along the median smooth 

 space; elytra subparallel, distinctly longer than wide, a fourth longer 

 and fully a fourth wider than the prothorax, the punctures small and 

 sparse but arranged in widely and feebly impressed series; abdomen 

 distinctly narrower than the elytra, subparallel, finely, not densely 

 punctulate. Male unknown; female with the sixth ventral evenly and 

 rather strongly rounded behind. Length 4. 1 mm.; width 0.66 mm. Penn- 

 sylvania ratllaus n. sp. 



Neither of these species seems to be at all common and I 

 have but four examples altogether. 



Dacnocbilus Lee. 



The o-eneral habitus of this genus is similar to that of Li- 

 nolathra and the coloration of the bod}'^ also reminds us of the 

 small slender species so named above. There are many 

 structural features, also, that prove the very close relation- 

 ship existing between the two genera, such as the hind tarsi, 

 gular sutures and disposition of the elytral punctures. Dac- 

 nochilus dWeYS especially in the form of the labrum, in the 

 f-hort obtrapezoidal form of the prothorax and presence of 

 long stiff tactile setae bristling at the sides of the body — so 

 greatly developed in Acalophaena. We have, as far as 

 known, but a single species as described below : — 



Form slender, convex and parallel, polished, pale testaceous throughout, 

 except about basal half of the elytra, which is abruptly black; head 

 well developed, wider than long, with a few coarse impressed punctures 

 near the sides, the latter feebly diverging behind the eyes and slightly 

 arcuate, the angles narrowly rounded; eyes large, prominent, at about 

 a third more than their own length from the base; antennae distinctly 

 longer than the head and prothorax, rather slender basally but gradually 

 strongly incrassate distally, the medial joints less than one-half longer 

 than wide; prothorax obtrapezoidal, distinctly wider than long, equal 

 in width to the head, the sides very feebly arcuate, the anterior angles 

 narrowly rounded, the basal more broadly, the punctures rather small, 

 very widely scattered toward the sides anteriorly and widely spaced in a 

 single series at each side of the median smooth area, elsewhere wanting; 

 elytra not quite as long as wide, parallel, the sides feebly arcuate 

 posteriorly, slightly wider and longer than the prothorax, the punctures 

 fine and feeble, widely spaced in a very few widely separated series, 

 each puncture bearing a stiff hair; abdomen behind the middle as wide 

 as the elytra, slightly narrower at base, finely, very sparsely punctulate 

 and polished. Male with the fifth ventral unmodified, except a small 



