DESCRIPTION OF GENERA AND SPECIES. 



1G9 



TjEgs: 1, 2, 4, 3; stout, comparatively short; uniform orange yellow or yellow, without 

 annuli ; armed copiously with long yellowish white Isristles, and rather short brownish 

 spines ; palps colored and armored as legs ; mandibles dark glossy brown, corresponding 

 with color of face, and strongly curved at the base ; conical, somewhat separated at the 

 tips; but little pubescent, except on inner edges. 



Abdomen: Ovate; dorsum well arched to spinnerets, which are placed directly under- 

 neath the high apical wall; apex but little if any narrower tlian base; color yellow or 

 yellowish green, which fades in alcohol to yellow ; dorsal folium limited l)y an indistinct 

 undulating ribl»on ; with a median longitudinal line branching from about the middle ; skin 

 beautifully reticulated and covered cjuite thickly with short, soft, yellowish hairs; at the 

 sides the greenish yellow color of the dorsum is broken into elongated lobes of dark 

 yellowish brown extending to the venter. The epigynum (Fig. 6c), viewed from the spin- 

 nerets, shows a yellow scapus curved over from the base of the atriolum, like the clasp of 

 a padlock ; viewed from the side {6d) the scapus is seen to be free at the apex ; the portulie 

 on either side are glossy, blackish brown. 



IMai.e : Fig. 7. Somewhat smaller than female, being 7 mm. long; otherwise similarly 

 marked, but in the specimens in hand the abdominal folium more decidedly marked. Legs 

 uniform orange yellow ; tibia-II not thickened, without any special clasping armature, and 

 not more numerously provided with dark brown spines than leg-I ; coxa-I has a marginal 

 spur on the apex; in the palps (Figs. 7a, 7b) the digit is globular, the cymbium yellow and 

 covered thickly with yellowish bristles; the embolus a simple curved hook; the radial joint 

 boat shaped, covered with a number of long yellowish bristles ; the cubital joint also short 

 and rounded ; these, like the humeral joint, are uniform yellow in color. 



• DisTRiiiUTioN: I have collected this specimen in Florida, the only point from which I 

 have specimens. 



No. 28. Epeira Thaddeus i1kxt> 



Date VII, Figs. 3, 4, •'). 



1S47. Epeira ThaddriusllEiiT/. J. B. S., Vol. v., p. 473; Id., Sp. U. S., p. 113, 



pi. 13, Fig. 6. 

 1879. Epeira baltiinorieiigis, Kevseklixi; . N. Spinn. Amer. i.. Verb. d. v.. b. (ies. Wien, p. 305, 



pi. 4, Fig. 8. 

 1884. Epeira thaddeus, Emerton . . . N. E. Ep., p. 309, pi. 34, Fig. 9. 

 1888. Epeira thaddeus, McCook .... Amer. Spiders and their Spinningwork. 



Fe.m.\le: Total length, 7 nmi. ; abdomen, 6 mm. long, 5 mm. wide; cephalothorax, 

 3.5 mm. long, 2.3 mm. wide ; measurement taken from one of the largest specimens. The 

 color varies from yellow and cretaceous to the most brilliant purple and pink, marking the 

 species as one of the most beautiful of our indigenous spider fauna. The legs vary in color 

 from yellow to orange yellow and to yellowish brown, a A-ariation which also marks the 

 cephalothorax. 



t'EPH.\LOTiiOR.\x : Corselet rounded, truncated, indented at base; dorsum high, arched; 

 fosse distinct ; corselet grooves feeble ; cephalic sutui'e distinct ; color yellow, flecked with 

 brown, slightly pubescent ; head colored as corselet, with dark median band in some speci- 

 mens ; caput slopes from the crest, is slightly pubescent, a band of long hairs down tlie 

 middle ; sternum shield shape, as broad as long, indented at edges, with sternal cones, one 

 in the middle, which is raised ; color uniform brown, rather glossy ; labium, large, tri- 

 angular, and maxillre broad as long, subtriangular at tip, colored like sternum. 



Eyes: Ocular quad on a prominence; front decidedly wider than rear, and about equal 

 to the side in length. Eyes about equal in size ; MF oval, on a black base ; MR round 

 and yellow; MF separated by about 1.5 to 2 diameters; MR by about their radius; side 

 eyes on tubercles, contingent, but equal in size; MF separated from SF by a little more 

 than their area, and from clypeus margin by about one diameter; front row lecurved, longer 

 rear row procurved. 



