34 
Psyche 
[March-June 
employed by the average carabid collector, which probably explains 
the apparent rarity of species of this genus. 
Micratopus aenescens (LeConte) 
Figures i, 2 
Blemus aenescens LeConte, 1848, p. 473. Type locality, “Georgia”, probably 
Habersham County. Type in Harvard Museum of Comparative Zoology. 
Tachys aenescens: Hayward, 1900, p. 197. 
Micratopus aenescens: Casey, 1914, p. 43. 
Micratopus fusciceps Casey, 1914, p. 43. Type locality, Vicksburg. Missis- 
sippi. Type in United States National Museum, new synonymy. 
Length 2. 1-2.5 mm - Dorsum of head dark chestnut; clypeus, 
labrum, antennae, pronotum and elytra brownish-piceous ; maxillary 
and labial palps, femora, coxae, and underparts of tibiae and tarsi 
flavotestaceous. Microsculpture of pronotum and elytra a very fine, 
anastomosing meshwork which imparts an opalescent cast; micro- 
sculpture of head isodiametric, open; integument more or less 
pubescent, least so on dorsum of head. 
Head with sides convergent, a little longer than wide, dorsum 
with minute punctures sparsely scattered and visible only at high 
magnification; labrum deeply emarginate, lateral lobes folded down 
over and partly obscuring mandibles, anterior margin bearing only 
four setae; mandibles short, thick, bifid at tip, without a seta in 
scrobe; mentum edentate, submentum with four (prebasilar) setae; 
maxillary and labial palps about as in Limnastis , penultimate seg- 
ments inflated, heavily pubescent, last segments minute, hyaline, 
glabrous; clypeus with a seta at each side, clypeolabral suture arcuate, 
convex forward ; frontal grooves shallow and very short, convergent ; 
eyes large and freely convex; only one pair of supraorbital setae. 
Pronotum about seven-tenths as long as wide, sides rounded and 
very feebly sinuate before the rounded, obtuse hind angles; base 
oblique behind hind angles, so that base is feebly “lobed” ; marginal 
gutter rather broad, hind angles not carinate ; disc sparsely pubescent. 
Elytra broad, depressed, subparallel, humeri prominent and apexes 
broadly truncate, length almost 1.5 times combined width; longitu- 
dinal striae moderately deep, distinct, interstriae each with a row of 
short pubescence; a single discal puncture on third stria near apex; 
umbilicate series with whips in punctures 1, 6, and 8. 
Antenna about six-tenths as long as body, segments II and III 
subequal and about six-tenths as long as segment IV; all segments 
more or less pubescent, but becoming more so from scape to segment 
