MORGAN HEBARD 289 



apex rather broadly rounded,^^ distinctly shorter than pronotum, attingent. 

 Furcula represented by a pair of elongate processes, which diverge at an angle 

 of about ninety degrees, tapering from their heavy and attingent bases to their 

 slender and sharply rounded apices, nearly three times as long as basal width, 

 length contained in that of supra-anal plate less than two and one-half times. 

 Supra-anal plate trigonal shield-shaped, medio-longitudinal sulcus percurrent, 

 but strongly defined only in proximal three-fifths, lateral portion deeply con- 

 cave, the lateral margins strongly raised and thickened i:)roximad, with a flexure 

 at end of proximal third, thence gradually diminishing in height and weakly 

 concave opposite apices of cerci at beginning of apical third; the apical portion 

 beyond deplanate with a small node latero-proximad on each side. Between 

 the supra-anal plate and the cerci a portion of a basal plate is conspicuously 

 extruded, this causing the elevation of the lateral margins of the plate. Cerci 

 suggesting those of M. microtatus here described, but distinctly more complex; 

 about twice as long as proximal width, broad proximad, tapering strongly in 

 proximal half, this due to the strong concavity of the dorsal margin, distal 

 half relatively slender, of nearly subequal width, dorsal and ventral margins 

 feebly convex to rounded apex, length about twice median (greatest) width, 

 external surface longitudinally concave below median line. Subgenital plate 

 with dorso-lateral angles at free margin rectangulate and rather sharply 

 rounded, more sharply rounded and prominent than in any other species of the 

 Marginatus Group; free margin of almost equal thickness and convexity 

 throughout, somewhat more thickened mesad but showing no trace of tuber- 

 culation; median section of plate of almost equal depth laterad and mesad; 

 surface flaring outward to free margin evenly throughout, this type distinctive 

 and wholly unlike that developed in any other species of the Marginatus Group. 

 Limbs much as in gracilipes, except that the caudal femora are distinctly 

 shorter and heavier. 



Allotype.— 9 ; same data as type. [Hebard Collection.] 



Size larger, form heavier than in male,^^ resultantly heavier than in any 

 females of the Marginatus Group. Fastigium of vertex distinctly broader and 

 loss deeply sulcate than in male. Eye proportionately much as in male. 

 Pronotum with lateral carinae subobsolete, obtuse angulation of caudal margin 

 somewhat broader but similarly rather sharp. Tegmina attingent (to sepa- 

 rated by a brief interval in the series), (normally) rather broadly rounded distad. 

 Limbs with caudal femora as distinctly shorter than in the related species as in 

 male. 



Coloration. — Male (intensive). General coloration clay color tinged with 

 cinnamon. Eyes russet. A postocular bar, continued on the prozonal por- 

 tion of the lateral lobes and broadening caudad, is shining blackish nunnmy 

 Ijrown. Tegmina tinged with cinnamon brown, particularh' laterad. Proxi- 

 mal segments of abdomen marked dorso-laterad with moderately large maculae 



^^ Normally thus in males, apex occa.sionally rather sharplj' roundetl; ai)ex 

 averaging more broadly rounded in females. 



*^ It is to be remembered that males of aspasmus are as lieavy as females of 

 microtalus. 



TRANS. AM. ENT. SOC, XLV. 



