EMBIOPTERA OF THE NEW WO'RLD — ROSS 



471 



mandibles, and submentum reddish brown ; antennae with basal two 

 segments black, segments 3 and 4 yellowish brown, segments 5 and 6 

 darker, remainder dark brown. Abdominal terminalia with tenth 

 tergite nearly black; tips of processes amber yellow.^^ Body length 

 5 mm. ; forewing length 3.5 mm., breadth 0.8 mm. 



Head (fig. 118) elongate; eyes rather small, slightly inflated, facets 

 outlined by pigmented interspaces; distance between eyes equal to 

 three eye widths; sides behind eyes two eye lengths long, slightly 

 curved, gradually convergent; posterior margin arcuate. Occipital 

 foramen as long as wide, evenly rounded anteriorly. Gular bridge 

 extensive, one and one-half submentum lengths wide. Submentum 

 quadrate, somewhat narrowed anteriorh'; sides unevenly arcuate, 

 corners rounded; anterior margin shallowdy emarginated. Mandibles 

 slightly curved ventrad at tips; apical teeth small. 



Figures 118-120. — Oligembia melanura, new species, holotype male (Texas): 118, Head; 

 119, terminalia (dorsal); 120, terminalia (ventral). Explanation of symbols on p. 403. 



Wings dark, interveinal hyaline stripes sharply defined. Ri united 

 at apex by a cross vein to Ro+s; bordered throughout its length by 

 reddish, granular lines. Ro+s represented by a pigmented vein ; forked 

 at basal third in forewing, at the basal fourth in hind; R4+5 forked 

 medially. 



Terminalia (figs. 119, 120) with tenth tergite (10) very dark, 

 acutely angulate basally, produced forward beneath apex of eighth 

 tergite; left process (10 LP) well developed, inner margin sinuous; 

 apex deeply excised with a sharp left apical projection and a stout, 

 irregular hook on right side, abruptly curved toward left; right process 

 (10 RPi) with inner margin nearly straight, outer margin gradually 

 slanted mesad forming a very acute, sclerotic sharp point apically 



" Some of the paratypes are entirely dark brown, with no part of the body or its 

 appendages otherwise pigmented. 



