126 MEMOIRS ON THE COLEOPTERA 



sides arcuate, the apex subcircularly rounded; surface with three or four 

 moderately coarse, feebly impressed and punctate striae, the punctures 

 of the broad flat intervals strong and moderately close-set in irregular 

 double series; abdomen finely, not closely punctate, the first segment 

 shorter than the next two, the last four equal in length, the fifth circularly 

 rounded; legs not very short. Female with smaller head and larger, less 

 prominent eyes, entire epistomal suture, smaller labrum and mandibles, 

 shorter antennae, having a distinct loose 3-jointed club, less transverse 

 prothorax and larger and longer elytra. Length (cf 9 ) 1.7-2.4 mm.; 

 width 0.8-1.0 mm. Massachusetts (Framingham), Frost. 



The male is distinguishable at once from the same sex of con- 

 vexulus by the very long and entirely filiform antennae, more acutely 

 dentiform anterior thoracic angles, larger size and rather more 

 elongate outline. 



Laemophlceus sphaerops n. sp. Male almost as in the male of filiger, 

 polished, piceous-brown, the under surface anteriorly and the legs paler; 

 head nearly similar, the upper mandibular tooth rather nearer the apex, 

 the antennae long and finely filiform, though shorter than in the preceding 

 and differing in the proportions of the basal joints, the first joint stout, 

 oval, not quite twice as long as wide, second as long as the first but much 

 more slender and as long as the fourth, the third longer than the second or 

 fourth and about as long as the succeeding joints after the fourth, eleventh 

 longer than the tenth but otherwise similar; prothorax very nearly as in 

 filiger though not so strongly or closely punctate; elytra nearly as in 

 that species but with the punctures smaller and sparser. Length (cf ) 

 2.5 mm.; wid h r.i mm. New York (the exact locality unrecorded); a 

 female from District of Columbia is also attached. 



This species is allied somewhat closely to filiger but the general 

 outline is stouter, the sculpture finer and looser and the antennae are 

 rather shorter, with the second joint notably more elongate; they 

 are also slightly less slender throughout. The eyes are minutely 

 setulose in all the species of this section. 



The convexulus and adustus sections of Lcemophlceus have several 

 peculiar features, separating them from the normal forms of the 

 biguttatus type. For example, the frontal margin lacks the two 

 obtuse projections of that typical section of the genus, and the epi- 

 stomal suture is generally broadly interrupted medially; the man- 

 dibles are longer, usually becoming very prominent in the males, 

 almost as in Parandrita, and the body is convex and not strongly 

 depressed, with the sides of the prothorax of a different contour. I 

 think that these sections, comprising at present convexulus, filiger, 

 spharops, adustus and fraterculus, should be given a special sub- 



