256 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



Legs : 1, 2, 4, 3 ; the color yellowish brown, without annuli, but darker shadings at 

 the tips of joints. The tibiie of legs-I, II, IV are provided witli brushes, which in the 

 specimen in hand are so much worn off in the alcohol that their form cannot be deter- 

 mined with accuracy. The palps are not long, the trochanter and humerus yellow, the tips 

 dark brown. The mandibles are conical, not receding, blackish brown in color. 



Abdomen : Subcylindrical, the base somewhat projecting over the cephalothorax, and 

 the apex projecting beyond the spinnerets; the width throughout is almost equal, except 

 at the apex, where it narrows somewhat into a rounded projection. The sides are yellowish 

 brown, marked with silvery jiubescence ; the dorsum golden yellow, with the black muscular 

 pits prominent, and veined lines passing from the middle point longitudinally to the apex ; 

 silvery pubescence appears to be scattered over the dorsal surface. The ventral pattern is 

 a broad, yellow band, dappled with silvery spots. The epigynum is without scapus ; the 

 margin of the atriolum is black, corneous, and provided on either side with tufts of 

 bristles that curve downward to the cleft. 



Distribution : Key West, Florida. (The Marx Collection.) In America the species is 

 doubtless limited to the Gulf Coast; but, on the supposition that, as above described, it is 

 quite identical with De Geer's species, it has a wide distribution throughout the subtropical 

 parts of America. 



No. 104. Nephila concolor/ new species. Plate XXIII, Fig. 1. 



Female: Total length, 28 mm.; cephalothorax, 12 mm. long, 8 mm. wide, 6 mm. at the 

 face; abdomen, 20 mm. long, 9 mm. wide. 



Cephalothorax : A long oval, the corselet flat and roughened upon the surface, sunken 

 at the fosse, which is a deep lateral indentation ; corselet grooves distinct, but abbreviated ; 

 cephalic suture deep and well marked ; the caput rises from the fosse, sloping gradually to 

 the face, the anterior portion of the corselet being raised therewith. Close to the fosse on 

 each side of the base is a strong, conical, blackish brown, corneous tubercle, directed for- 

 ward. The colors of the specimen are much faded out by alcohol, but the corselet appears 

 to be yellowish brown, the caput blackish brown, covered rather freely with blackish hairs. 

 The sternum is shield shaped (Fig. Ic), bluntly pointed at the apex, widest in front, glossy 

 blackish brown color, provided rather sparingly with stiff brown bristles ; the sternal cones 

 prominent above coxae-I, II, III, those in front of cox£e-III largest, and a cone much larger 

 than all in front of the labium. The labium is subtriangular, the length equal to the width 

 at the base, on each corner of which is a low wart; the middle part is lowly humped. 

 The maxilte are normal. 



Eves: Ocular quad on a conical eminence, rounded to a blunted point in the forepart 

 between the middle eyes; the quad narrower in front than rear, which equals the length; 

 MF somewhat larger than MR, separated by about 2 to 2.5 diameters, MR by 2.5 to 3 

 diameters. Side eyes on tubercles, nearly equal in size, widely separated by the distance of 

 nearly two diameters; clypeus height about ^ to 2.5 diameters MF; front eyerow slightly 

 recurved, rear row somewhat procurved. 



Legs : 1, 2, 4, 3 ; ruddy brown, with dark glossy brown apical annuli ; tareus and meta- 

 tarsus black; not stout, as compared with the size of the species; provided with short 

 yellowish gray hairs, thickly placed in certain parts, particularly at bases of thighs, and 

 with short dark spines ; the apices of tibire-I, II, and the whole of tibia IV, show brushes 

 of short curved bristles; the coxie strongly pubescent, especially on the sides, dark brown 

 at the bases, reddish brown at the apex, presenting a lumpy appearance, caused by two 

 protuberances on coxse-III and IV and one upon coxa-II, coxa-I being smooth. The 

 palps are colored and armed as the legs; the humeral joint underneath is thickly covered 

 with whitish gray hair; mandibles ratlier short, arched at the base, conical, glossy black 

 in color. 



* I adopt the cabinet name of Dr. Marx. The species closely resembles the preceding one (N. clavipes 

 Lin.), and may be the same. 



