264 MEMOIRS ON THE COLEOPTERA 



finely reflexed, the gutter lost at the deplanate latero-basal area; 

 elytra two-fifths to one-half longer than wide, parallel, with feebly 

 arcuate sides and very obtuse apex, two-fifths wider than the pro- 

 thorax, the sinus short and barely visible; striae deeply impressed, 

 the scutellar long, parallel; intervals convex throughout; hind tarsi 

 slender but short, three-fifths as long as the tibiae, the first joint as 

 long as the next two combined, not quite as long as the fifth. Length 

 (cf 9 ) 3.5-3-7 mm.; width 1.2-1.45 mm. Texas (Galveston). 



lucens n. sp. 



Body more slender, only moderately convex, much smaller in size, 

 shining, blackish-piceous, the pronotum clear dusky-testaceous 

 throughout, sometimes blackish and gradually pallescent at the 

 periphery; elytral suture very finely, the external margin more 

 broadly, posteriorly, pallescent; legs, epipleura and prosternum 

 pale; head only slightly narrower than the prothorax, with rather 

 long neck and moderate, very prominent eyes; antennae very slender, 

 fully half as long as the body, fuscous, the two basal joints pale; 

 prothorax transverse, a third to two-fifths wider than long, the sides 

 rounded anteriorly, converging and evidently sinuate in about basal 

 half, the hind angles right, very sharply marked and sometimes 

 slightly prominent; base and apex equal in width; surface feebly 

 convex, the stria fine but very distinct, entire, the anterior transverse 

 impression visible but fine, rather clo^e to the apex, the basal angles 

 subdeplanate, flattened and punctulate, the foveae oval, rather deep 

 and obscurely punctate; elytra two-fifths longer than wide and fully 

 one-half wider than the prothorax, wider behind than before the 

 middle, very obtuse at apex, the apices rather abruptly, rectilinearly 

 oblique but without sinus, striae impressed, the scutellar long and 

 strong, the intervals convex; hind tarsi as in lucens. Length (cf 9 ) 

 2.4-2.8 mm.; width o. 8-1. o mm. Tndiana to Mississippi (Vicksburg). 

 Not rare. [Acupalpus rectangnlus Chd.] rectangulus Chd. 



The number of setigerous elytral punctures in lucens is rigorously 

 four in all the eight series of the four individuals at hand. In 

 rectangulus the number is more inconstant, some of the series having 

 four and some five punctures.* 



* Since the above matter relating to Goniolophus was put in print, I have 

 received from Mr. Knaus two specimen?, taken near New Orleans, La., of a species 

 that answers very well to the description of longulus quoted in the table. The pro- 

 thorax is less sinuate basally than in the others and the basal angles are more obtuse 

 and blunt, the basal foveae deep, oval and abrupt, with their bottoms closely punctu- 

 late. I unhesitatingly label them longulus, although there are plainly four foveae in 

 the substrial series, the three mentioned by LeConte being therefore doubtless due 

 to an error of observation. The species is very different from lucens, being narrower 

 and more elongate, with much shorter prothorax, having much deeper subbasal 

 fovese and more blunted basal angles. 



