. Bulletin. Natural history; Natural history. Fig. 911.—Chimarra elia, male genitalia. without perceptible pattern; in life the in- sect looks almost black. General structure typical for genus. Male genitalia as in fig. 911. Ninth and tenth tergites fused, the anterior margin of the ninth with a short, stout, somewhat hook-shaped apodeme, the tenth tergite forming an irregular, almost membranous hood over the apex of aedea- gus; ventrad of this hood are situated the small, round cerci and, beyond these, the lat- eral margin of the segment is produced into a sharp, minutely serrate point. Ninth
. Bulletin. Natural history; Natural history. Fig. 911.—Chimarra elia, male genitalia. without perceptible pattern; in life the in- sect looks almost black. General structure typical for genus. Male genitalia as in fig. 911. Ninth and tenth tergites fused, the anterior margin of the ninth with a short, stout, somewhat hook-shaped apodeme, the tenth tergite forming an irregular, almost membranous hood over the apex of aedea- gus; ventrad of this hood are situated the small, round cerci and, beyond these, the lat- eral margin of the segment is produced into a sharp, minutely serrate point. Ninth sternite triangular, the apico-mesal line bearing a long, projecting, sharp keel which is slightly serrulate, is situated directly be- low the base of the claspers and occupies most of the exposed ventral margin of the sternite. Claspers somewhat triangular, the dorsal corner rounded and bearing sev- eral fairly long setae, the remainder of the clasper with shorter setae, the dorsal sur- face of the apico-mesal corner with a slender but strong black spine. Aedeagus typical in general proportions for the ater- rima group, having the somewhat expanded internal base, beyond which it is cylindrical, the exserted apex membranous and narrow, not sclerotized. Holotype, male.—Spring-fed stream west of Brackettville, Texas: April 17, 1939, H. H. & J. A. Ross. Chimarra florida new species This species is a close relative of obscura, differing from it, however, in the short mesal process of the ninth sternite, the longer claspers, which are wider at base and more slender at apex, and the longer and stouter lateral processes of the tenth tergite. From species of the aterrinia group which also have the short mesal process of the ninth sternite, this new species may be distinguished by the hooked aedeagus. Male.—Length 7 mm. Color black, the wings without pattern, the femora some- times brownish. General structure typical for genus. Male genitalia as in fig. 912. Tenth tergite wit
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
