EMBTOPTERA OF THE NEW WORLD ROSS 489 



Head (fig. 151, paratype) rather broad, eye interspace one and one- 

 half eye widths wide, sides behind eyes one eye length long, weakly 

 convergent, slightly arcuate ; caudal margin broad, shallowly arcuate ; 

 eyes large, somewhat inflated, facets without pigmented interspaces; 

 two prominent, reddish-brown lobes are present beneath antennal 

 scape at outer base of mandibles. Mandibles with bases very large, 

 greatly produced inward; inner medial angles abruptly angled; left 

 mandible with three small dentations at inner apex, margin behind 

 proximal tooth broadly, weakly arcuate; right mandible with two 

 small, closely approximated apical teeth; inner margin with a char- 

 acteristic tooth midway between proximal apical tooth and medial 

 angle. Submentum narrow behind; sides divergent to apical third, 

 thence parallel, apical angles strongly produced forward, rounded 

 distally; anterior margin transverse, straight. Occipital foramen 

 somewhat pointed anteriorly. 



Wings large, broad, extending beyond tip of abdomen in living 

 specimens. Venation without specific features. Fore wing with seven 

 C-Ri cross veins in apical half, three Ri-Ro+o cross veins and no others ; 

 hindwing with five C-Ki and three R1-R2+3 cross veins. 



Hind basitarsi elongate, with only the distal sole-bladder. 



Terminalia (figs. 152, 153, paratype) with tenth tergite (10) acutely 

 produced forward beneath ninth tergite nearly to its base, this pro- 

 jection weakly pigmented; exposed tergite without definite indications 

 of sutures. Left process (10 LP) with a strong, evenly arcuate, 

 talonlike projection continuous with inner margin ; outer portion short, 

 apical margin diagonal (from left to right), with a stout submedian 

 projection. Major right process (10 RPi) broad and unmodified 

 basally, outer margin rather straight, inner margin sinuous; second- 

 ary right process (10 RPo) darkly pigmented. Ninth sternite (H) 

 with sides rounded, lateral areas pigmented but becoming broadly 

 membranous medially; produced caudad as a broad process (HP), 

 somewhat tapered but broadly truncate distally and "granulate'' on 

 left side. Left paraproct (LPPT) fused to side of HP, suture 

 becoming somewhat expanded distad, apex pointed and notched sub- 

 terminally on left side. Left cercus-basipoclite (LCB) well pigmented, 

 bilobed mesially; the dorsal lobe shortest, sclerotic, curved upward 

 and cleft distally, forming two stout "claws"; ventral lobe sclerotic 

 elongate, gi-adually tapered and slighty curved, projecting almost to 

 central axis of body. Basal segment of left cercus (LCi) weakly pig- 

 mented in basal half and along inner margin, membranous at outer 

 apex, gradually swollen distad; terminal segment (LC2) cylindrical, 

 gradually tapered distad. Right cercus with basal segment dark, 

 especially at base; ver}^ gradually tapered, unlobed at apex; terminal 

 segment similar to that of left cercus. 



