MORGAN HEBARD 375 



The male cerci show some convergence toward the type devel- 

 oped in M. dypealus (Scudder), a species which belongs, however, 

 to the distinct Clypeatus Group. These two .groups include 

 species showing many features of similarity; the members of the 

 Clypeatus Group are, however, all decidedly larger and develop 

 a distinctive color pattern of the caudal femora. 



Type. — cT; Evergreen, Conecuh County, Alabama. August 

 4, 1915. (M. Hebard.) [Hebard Collection, Type no. 561.] 



Size large, form moderately robust. Vertex and frontal costa below median 

 ocellus shallowly depressed; interocular space narrow, slightly wider than 

 proximal antennal joint. Eye slightly less than twice as long as infra-ocular 

 sulcus. Pronotum with medio-longitudinal carina well developed on meta- 

 zona, obsolete on mesozona, weak on prozona (varying in the series to per- 

 current, weak on prozona and mesozona and cut only by the principal sulcus), 

 transverse sulci distinct; disk with lateral margins very feebly diverging 

 caudad, almost subparallel, caudal margin broadly obtuse-angulate pro- 

 duced with apex rather broadly rounded. Tegmina semi-reduced, twice 

 as long as median femur (varying to distinctly less than twice that length in 

 the series), subacuminate, the apices narrowly rounded, sutural margins 

 very weakly convex. Prosternal spine elongate cylindro-conical, with apex 

 rather sharply rounded. Furcula merely the briefest of points projecting 

 from the penultimate tergite, poorly indicated on the surface of the tergite 

 as broad, feebly convex areas, between which the tergite is divided by a medio- 

 longitudinal suture. Supra-anal plate broad shield-shaped, lateral portions 

 longitudinally broadly concave, medio-longitudinal carina deep and narrow 

 in proximal half (varying in one paratype to shallow and poorly defined), 

 at end of which it is terminated by a low but sharp transverse carina which 

 curves cephalad in its median section and caudad in its meso-lateral sections, 

 in the distal half of the plate the disto-lateral carinae are distinct and parallel 

 (in one paratype weakly convergent caudad) to proximal portion of this 

 section. Cerci broad, the greatest distal width about three-quarters the 

 length, very broad at base, narrowing very slightly to middle, the ventral 

 margin moderately concave, the dorsal margin broadly angulato-concave 

 with distal half straight, disto-ventral angle acute rectangulate, disto-dorsal 

 section produced disto-dorsad, very broadly convex, this rounding weakly 

 into the moderately oblique and almost straight distal margin; external 

 surface of cercus showing a very feeble convexity, the axis of the cercus 

 showing a weak inward curvature. Subgenital plate full, broad, proximo- 

 lateral depth equal to median depth, free margin semi-elliptical in dorsal 

 aspect; when seen from the side the lateral portions are broadly concave to 

 the slightly produced blunted median section. 22 



22 The degree of production of this extremity is seen to be slightly variable, 

 as is also true of querneus in the series of that species now before us. 



TRANS. AM. ENT. SOC, XLVI. 



