EMBTOPTEEA OF THE NEW WO'RL,D — ROSS 455 



Family OLIGEMBIIDAE 



Oligembiidae Davis, 1940e, p. 536 ; 1940f , p. G80 ; 1942, p. IIG. 



American Embioptera. The males with mandibles dentate apically ; 

 E4+5 forked in both wings, M and Cuia simple, all the above veins sub- 

 obsolete, represented only by rows of macrotrichiae and intervenal 

 hyaline stripes; tenth tergite not completely cleft to base (except in 

 Idioemhia) ; left cercus two-segmented, the basal segment without 

 echinulations. Hind basitarsi with only one bladder. 



Type genus. — OUgembia Davis. 



Distrihution. — Warm-temperate and tropical America. 



Three genera are included in this family — OUgembia Davis, well 

 known by virtue of its many species ; the new genus Idioenibia; and, 

 tentatively, the poorly known genus Diradius Friederichs, based upon 

 an inadequately described unique specimen. 



KEY TO GENERA OF OLIGEMBHDAE (MALES) 



1. Left cercus-basipodite (LCB) not fused to left cercus; right process (10 RPi) 



blunt distad Diradius 



Left cercus-basipodite fused to basal segment of left cercus ; right process 

 sharply pointed distad 2 



2. Right tergal process separated at base from tenth tergite by a clearly defined, 



complete, transverse suture ; tenth tergite not longitudinally cleft- Oligembia 

 Right tergal process continuous with tenth tergite, without a complete trans- 

 verse basal suture; tenth tergite narrowly, longitudinally cleft. Idioembia 



IDIOEMBIA, new genus 



Males. — Characters similar to those of the following genus, OUgem- 

 bia., but with the tenth tergite completely cleft to base, the suture very 

 narrow, extending diagonally on right side of tergite. Right tergal 

 process (10 RPi) continuous with right hemitergite (10 R), without 

 a complete, basal, transverse suture as in OUgembia. 



Female. — Unknown. 



Genotype. — OUgembia baiiksi Davis, by present designation. 



The definite longitudinal suture of the tenth tergite of this genus 

 is occasionally represented in the apparently more highly specialized 

 genus OUgembia by a slight depression or gi'oove in a similar posi- 

 tion. The absence of the complete transverse basal suture of the right 

 tergal process is the most useful distinguishing character. 



IDIOEMBIA BANKS! (Davis), new combination 



Figures 92-04 



Ohligemlia ianksi Davis, 1939b, p. 221, figs. 13-20. 



Uolotype. — Male, Museum of Comparative Zoology (No. 23721). 

 Type data. — Villa Rica, Paraguay (F. Shade) . 



