18 NEW YORK STATE MUSEUM 
Synonymy 
Thomisus? dubius Hentz, Bost. Jour. Nat. Hist., 1847, 5:448, pl. 
TR Tanne dubius Hentz, Proc. Bost. Soc. Nat. Hist., 1868, 11 :106 
Thomisus? dubius Hentz, Occ. Papers Bost. Soc. Nat. Hist., 2, 
1875, p. 82, pl. 10, fig. II 
Thanatidius dubius Simon, Hist. Nat. Araignées, 1808, 2:288, 293 
Thanatidius dubius, Banks, Proc. Acad. Nat. Sci. Phila., 1900, 52; 
539 
Remark. Simon designated Thomisus dubius Hentz as 
the type of the genus Thanatidius but the diagnosis he gives does 
not correspond to the characters of the type as described and figured 
by Hentz. The characters given in Simon’s definition of the genus 
were very evidently based on a specimen of Tetragonoph- 
thalma undulata Keyserling, a species perfectly distinct but 
not belonging in Tetragonophthalma and therefore in this revision, 
made the type of a new genus. 
Ty Gehonws eral I, wemuUis Mews Deen veay eSnerallhy ime- 
garded as identical; they resemble one another in general propor- 
tions and arrangement of the eyes but differ in size, in the structure 
of the epigynum, and development of the color pattern. A mature 
female collected by Nathan Banks at Auburn, Ala., and recorded 
in the Proc. Acad. Nat. Sici. Phila., 1900, 52:539, 1s T. dubius. 
Distribution. North Carolina, *Auburn, Ala.; *Washington, 
DAC | 
Thanatidius tenuis (Hentz) 
Bost. Jour. Nat. Hist., 1847, 5:440, pl. 23, fig. 12 
Type: Thomisus? tenuis Hentz; type specimen not known to exist 
Type locality: Alabama 
Female (alcohol) : Length 8mm; iegs I-2-4-3; pl. 2, figs. 1-5 
Cephalothorax dull yellowish above, lighter on the cephalic part 
and in front of the dorsal groove; between the median eyes a 
prominent brush of long, white hairs extending forward; sides of 
cephalothorax sparsely covered with short, yellowish brown hairs 
in patches. Eyes (pl. 2, fig. 2) almost of equal size, the posterior 
lateral slightly larger; four anterior eyes form a triangular area 
one and one-half wider anteriorly than long; anterior lateral eyes 
protuberant from anterior margin of head thus obliterating the 
clypeus; anterior lateral margins of the head prominently angled; 
transverse space occupied by the anterior lateral eyes only a little 
wider than that of posterior median eyes. Chelicera yellowish white 
spotted in front with black; lower margin of furrow armed with 
* This character indicates that specimens have been examined from localities 
mentioned. 
