1971] 
Barr — Micratopus 
35 
Fig. 2. Aedeagus of Micratopus aenescens (LeConte), left lateral view, 
composite sketch from four preparations. Paramere shown detached. Length 
0.30 mm., height 0.16 mm. 
IV. Male tarsi not differentiated from female; last abdominal 
sternite with only two marginal setae in both sexes. Protibia obliquely 
truncate near apex. 
Aedeagus (Figure 2) highly modified, trapezoidal, short, thick, 
and laterally compressed, about 0.16 X 0.30 mm. long; right side 
with a loosely attached lamina projecting a short distance upward 
and forward and articulating with a single slender (left?) paramere 
bearing two seatae at its apex; basal orifice a simple slot with no 
evident lobes; aedeagus walls thin, hyaline, with a thin sclerotized 
strip antero-dorsally and another, vertical strip at apex on left 
side ; internal sac with six rather complex sclerites : 1 ) basoventral : 
scroll-shaped, bifurcated, with minute spines internally; (2) dorsal: 
a slender, horizontally oriented, arcuate spicule; 3) basal: a slender, 
vertically oriented, arcuate spicule; 4) first medial: broad, bilobed, 
with a dorsal hook and ventral projection; 5) second medial: slender, 
bilobed, dorsal lobe bifurcate; and 6) apical: a blade-like hook. 
Measurements of a male from Gaits Landing, Cherokee County, 
Georgia (T. Barr, private collection) : total length 2.44 mm., 
head 0.48 mm. long X 0.44 mm. wide, pronotum 0.50 mm. long 
X 0.68 mm. wide, elytra 1.46 mm. long X 1.01 mm. wide (com- 
bined), antenna 1.46 mm. long, aedeagus 0.30 mm. long. 
