100 
Psyche 
[June-Sept. 
beyond this concave to subangular apex; apical margin 
feebly, evenly arcuate. Connexivum unlike the rest of dorsal 
surface, apparently coarsely punctate. Abdomen gradually 
widening to the briefly flaring posterior lateral margins of 
fourth visible segment at which point it is almost one-fourth 
wider than greatest width of pronotum, 125: : 104, the mar- 
gins of fifth segment concave but posteriorly convergent and 
margins of sixth gradually rounded. Lobes of sixth ab- 
dominal segment reaching apical eighth of greatly enlarged 
and obscured terminal segment. Under surface almost en- 
tirely clouded by a while film but with the abdominal venter 
evidently evenly and relatively finely granulate-punctate. 
Legs short, the femora strongly incrassate at middle. Color 
of entire body apparently rather uniform dark brown. 
Size, length 7.45 mm., width (pronotum) 2.6 mm. (abdo- 
men) 3.2 mm. 
Holotype: No. 4635 (male), Museum of Comparative 
Zoology, Harvard University; in Haren collection of Baltic 
amber insects. 
Closely allied to the widespread European Mezira tremulse 
(Germar) which occurs along the shores of the Baltic to- 
day. 5 However, the antennae are shorter and stouter, the 
paraclypeal lobes are broader and more dilated anteriorly, 
the antero-lateral pronotal angles are more produced an- 
teriorly and are broadly rounded and the size is smaller than 
in tremulze. 
5 Schumacher, F. Mezira tremulse (Germar), ein Naturdenkmal aus 
dem Urwalde von Bialowies in Polen. Deutsch. Ent. Zeit., 1919: 
285-288, 3 figs., 1 map. 1919. 
