MORGAN HEBARD 165 



weakly triangularly produced and broadly and bluntly l)i]obate. Subg-enital 

 |)latc with lateral portions moderately ascendant, abrui)tly emarsinate in 

 such a way that a large s(]uare euiarginatiou is left on each side of the mesal 

 produced portion, the angkis of which are rounded, projecting angles of lateral 

 portions thus formed very bluntly acute-angulate; meso-distal portion rf 

 plate produced an equal distance caudad, three-fifths as long as broad, its 

 lateral margins straight and very weakly convergent, its distal margin very 

 broadly rounded obtuse-angulate. Styles situated at bases of the square 

 lateral emarginations, similar, heavy, cylindrical, twice as long as broad 

 with apices bluntly rounded, extending as far caudad as median and lateral 

 portions cf the plate; ventral surfaces of styles subchitinous and weakly 

 concave, dorsal surfaces well su})plied with mimite but stout spines from 

 base to apex. Lateral portions of subgenital plate adjacent to these styles 

 somewhat thickened and hairy on both internal and external surfaces. Sin- 

 istrad, from the soft integument within the anal chamber, projects distad an 

 elongate, slightly curved, chitinous spike, with a smaller, similar spine, also 

 directed distad, at its base. Limbs and their armament, pulvilli and arolia 

 as normal for Neoblattella. Tarsal claws symmetrical; flange, usual in 

 the genus, very weakly developed and marginal teeth very mimite, micro- 

 scopic, subobsolete. 



General coloration translucent ochraceous-buff. Lateral margins of pro- 

 notum and all of tegmina weakly transparent, tinged with ochraceous-buff 

 more strongly than in fratercula. Disk of prcnotum ochraceous-buff with a 

 picturing of prout's brown, which is not complex, but is distinct. " Whigs 

 hyaline with a slight iridescence, very faintly tinged with ochraceous-buff, 

 veins and distal portion of anterior field more strongly so, clubs of costal 

 veins oi)aque ochraceous-buff. Head ochraceous-buff, with a broad inter- 

 ocular band of dark prout's brown, four suffused spots of the same between 

 the ocelli, four more in an arcuate line between the antennal sockets and one 

 on each side ventro-mesad of the antennal sock(!ts. Antennae ochracecu.s- 

 butT with first and second joints marked with a suffusion of prout's brown. 

 Pal|)i, underparls and limbs o(!hraceous-buff, the latter with flecks of prout's, 

 brown at bases of the heavier si)ines. Dorsal surface of abdomen mottled 

 ochraceous-buff and warm buff. Cerci ochraceous-buff, all of the segments 

 ventrad and three meso-distal segments dorsad, toward their internal margins, 

 showing suffusions cf prout's brown. 



Length of body, 9.5; length of pronotum, 2.S; width of pr jiiotum, 3.7; 

 length of tegmen, 10.5; width of tegmen, 3.3 mm. 



The type is uni(|ii(\ 



Ischnoptera bicornuta new spe(;ies (Plate VI, figures 7, S and 0.) 



This species ])eloiigs to tlie group including I. tolteca Saussure. 

 Coinpared with a pair from the National Aluseuni b(;ionging 

 1o that species, from Santa Lucrecia, Vera Cruz, bicornU is 

 foiiiul (() (hffer in liotii sexes in the i)ron()ttil co\oy pattern, the 



TK.V.NS. A.M. EN'T. SOC, XLVIU. 



