MORGAN HEBARD 1 83 



pronotal blotches are usually less conspicuous, due in part to the 

 normally more deeply colored suffusion at the caudal margin of 

 the pronotum, and the more extensive dark coloration of its lateral 

 margins. Great individual variability in the extent and intensity 

 of these markings, however, sometimes occurs in both species, this 

 wholly ascribable to intensification and recession of the color 

 pattern. 



Characters of Male. — (Jewfish, Florida.) Size large, but not as large as ameri- 

 cana: form stout. Head short and broad; interocular space broad, about one and 

 one-half millimeters in width; ocellar areas forming obtuse angles with intcrocellar 

 area, ocelli pale and distinct. Pronotum very weakly convex mesad, the sides 

 weakly but distinctly deflexed laterad from the discal area and showing a very weak 

 concavit}-, oblique sulci of disk subobsolete; form as in americana, but not as deep, 

 with caudal angles not as broadly rounded. Tegmina and wings elongate, but not 

 as much so as in americana, fully developed. Dorsal surface of abdomen with 

 median segment showing a broad and shallow- concave sulcus meso-cephalad, in 

 which is situated a heavy tuft of silky hairs, the more cephalic form a fringe directed 

 caudad, the much larger remainder spring from the medio-longitudinal line and 

 form heavy fringes directed latero-caudad. Four proximal dorsal abdominal seg- 

 ments with latero-caudal angles very sharply rounded;-'- fifth and sixth with these 

 angles weakly acute-angulate produced in increasing ratio caudad, the latter with 

 caudal margin showing a broad convexity meso-laterad on each side and a broad 

 and shallow angulate emargination mesad; seventh and eighth concealed. Supra- 

 anal plate entirely chitinous, surface shallowly concave; roughly trapezoidal in 

 form, with disto-lateral angles broadly rounded and distal margin showing a weak 

 convexity. Cerci moderately elongate, not as attenuate distad as in americana, 

 but with apex acute. Sinistrad within the anal chamber, an elongate, slender, 

 chitinous arm extends caudad, curving dorsad toward the apex, which itself is flat- 

 tened and terminated in a thorn, curved dextrad; near the base of this not extensive 

 distal, flattened portion, on its dorsal margin, is situated a smaller thorn, feebly 

 curved sinistrad. Above this is situated a very elongate chitinous process, directed 

 dextrad, with elongate, straight, aciculate apex; this process bears proximo-dorsad 

 a small, elongate lobe, also directed dextrad. Three other short, stout, curved, 

 chitinous, thorn-like processes occur, one dorso-mesad, the other two dextrad, 

 springing from convolute, chitinous structures. Subgenital plate similar to that 

 of americana, except that the broad transverse mesal portion of the free margin 

 shows a weak mesal emargination and the styles are about as long as the plate. 

 Limbs elongate and slender. 



Characters of Female. — (Bilk's Island, Georgia.) Much like this sex of americana, 

 difi"ering from the male in the same features. When compared with females of 



-^- Sometimes a slight production of these angles is present, while in some specimens 

 they are more nearly acute than in others. 



MEM. .\M. ENT. SOC, 2. 



