1988] 
Heie & Poinar — Fossil aphid 
155 
for the description. Placing the amber piece in mineral oil facilitated 
microscopic observation. 
Description 
Mindazerius gen. nov. 
Wing venation as in Mindarus Koch (Fig. 3). Pterostigma long, 
slender, reaching apex of the fore wing; radial sector long and nearly 
straight, leaving the proximal half of pterostigma; media with one 
fork; cubitus branches leaving main vein at separate points, the 
distal one curved backwards; siphunculi present, short, but rather 
well developed, truncate, broad at base; cauda rather long and 
slender; processus terminalis of antenna about half as long as basal 
part of ultimate antennal segment; fore femur much thicker than 
hind femur. 
Main differences from Lizerius and Paoliella: Anal plate not bio- 
lobed; cauda not distinctly knobbed. 
Monotypic. Type-species: Mindazerius dominicanus sp. nov. 
Mindazerius dominicanus sp. nov. 
Body length 1 .6 mm (Fig. 2). Largest width of abdomen 0.68 mm. 
Frons with three small tubercles placed between antennal bases; 
width of head across eyes 0.37 mm, indistinct lines on the underside 
of the head may be interpreted as part of the epicranial suture (Fig. 
11). Eyes very large, semiglobular, with distinctly separated, rather 
large ocular tubercles; longitudinal diameter of eye 0. 1 1 mm exclud- 
ing the tubercle, 0.13 mm including the ocular tubercle. Ocelli with 
dark rims. Antenna 6-segmented, 0.7 X body; lengths of segments in 
mm: 1-0.07, II-0.07, III-0.35, IV-0.26-0.27, V-0.2 1-0.22, VIa-0.1 1, 
VIb-(processus terminalis) 0.055-0.065; processus terminalis 0.5-0.6 
X basal part of Vlth segment (Via), 0.16-0.19 X segm. Ill; segm. 
IV-0. 74-0.78 X III; V-0.61-0.62 X III; VI-0.47-0.49 X III; segm. 
Ill with 7 subcircular secondary rhinaria in a row on the slightly 
thickened proximal two-thirds (Fig. 6); the other segments without 
secondary rhinaria. Rostrum rather short, about 0.4 mm long (0.3 in 
an oblique view from the polished plane of the amber piece; 0.3 X 
square root of 2 = 0.42), nearly reaching to middle coxae, rather 
slender; apical segment about 0.07 mm, of about the same length as 
segment II of hind tarsus. 
