EMBIOPTERA OF THE NEW WORLD ROSS 467 



wing, at basal third in liinchving; R^+s forked at basal third in both 

 wings; hyaline lines broadest in forepart of wing, not clearly defined. 



Terminalia (figs. 106, 107) with tenth tergite extending basally only 

 one-third beneath ninth tergite; not acutely produced basally. Left 

 tergal process (10 LP) narrow, parallel-sided, nearly straight, only 

 slightly projected to the left ; apex scarcely expanded, rather simple, 

 thickened, acutely, sj-mmetrically cleft dorsally, subtended b}^ irregu- 

 lar broad lobe. Right tergal process (10 RPi) broad basally. 

 abruptly narrowed apically, thence parallel-sided and sclerotic; tip 

 acutely pointed. Inner flaplike process (10 RP2) lying partially 

 beneath base of 10 RPi, with a sclerotic rod submedially. Process of 

 hypandrium (HP) and left paraproct (LPPT) fused, the latter de- 

 veloped caudad as a long dorsally curving process equal in length 

 to 10 RPi. Left cercus basipodite (LCB) an irregular sclerotic ring, 

 produced inward along base of left cercus as a blunt lobe, not bearing 

 processes or clawlike hooks. Right cercus-basipodite present as a 

 narrow, incomplete sclerotic ring on outer side of base of right cercus. 

 Cerci pale, membranous. 



Female. — No specimens available, i 



Holohjpe.— Male, on slide, U.S.N.M. No. 56053. 



Type data.— Iquitos, Peru, March-April 1931 (R. C. Shannon), 



Remarks. — An additional specimen in the United States National 

 Museum, badly damaged, also with the above data, is probably this 

 species. It differs from the holotype in having 10 LP formed much 

 as in hubhardi and hrevicauda (that of the holotype may be broken) 

 but with a stouter inner projection on its apical margin ; 10 RPi has 

 a sinuous outer margin and is more fleshy (this may be anomalous) ; 

 LCB has a well-developed process suggestive of buscki with two 

 "claws" (the condition in the holotype may be anomalous). In spite 

 of this variation, the species is recognizable by its short, circular head 

 with large eyes, 



OLIGEMBIA (OLIGEMBIA) DARLINGTONI, new species 

 FiGXJBES 111-114 



Male (holotype on slide) . — Head dark brown, becoming more golden 

 anteriorly; antennae brown; mandibles golden brown; submentum 

 reddish brown; prothorax pale, tan; pterothorax, legs, wings, and 

 abdomen light brown; terminalia largely dark brown, cerci pale. 

 Length 6.6 mm. ; f orewing length 5.0 mm., breadth 1.25 mm. 



Head (fig. Ill) with form as illustrated; eyes with interspaces of 

 facets slightly pigmented; occipital foramen rounded anteriorly; sub- 

 mentum outline indicated by dotted line in figure. 



