DESCEIPTION OF GENERA AND SPECIES. 207 



spine. The palp is highly developed in the digital bulb. The eyes resemble substantially 

 those of the female. 



Distribution : I have an immature male and female, collected from the neighborhood 

 of Philadelphia. The female aliove descriljed is from the District of Columbia, the male 

 from Selma, Ala. (Marx Collection.) The .spider as originally described was collected and 

 figured Ijy Alibot in Georgia, and it has further been observed in North Carolina, Florida, 

 Virginia, and as far north as Connecticut. It thus appears to hihabit the entire Atlantic 

 Coast from New England to Florida, showing a large elasticity of organism. It probably 

 has a wide distribution throughout the United States. 



Genus CAHEPALXIS L. Koch, 1871. 



This genus is distinguished by a high and rounded corselet, steeply arched at the 

 sides. The caput is a lufty conical elevation, rounded at the top, which towers above the 

 crest of the corselet, the summit occupying about the middle j)oint of the cephalothorax, 

 whence it rolls downward to the fosse by a sharp declivit}-, ami with a somewhat arched 

 incline forward to the eye space. The face is distinguished by a forehead which projects 

 far above the eye space, and is itself considerably higher than in the typical species, twice 

 as high as the lower part of the face. Both eye rows are procurved, and the side eyes 

 placed low down upon the outer margins of the clypeus. The midfront eyes are separated 

 from the sidefront by a space much greater than that which divides themselves, in this 

 resi^ect resembling Epeira. The legs are in order of length 1, 2, 4, 3, the first and second 

 pairs almost equally long, and are without spines. The length of the maxillae equals the 

 width, thus substantially resemljling Epeira. The abdomen is cylindrical ; about one-third 

 longer than broad ; clothed with soft skin ; carried in a position almost perpendicular ; the 

 base has tubercles, whose summits in the typical species are divided into several peaks. 

 The spinnerets are distal. 



No. 6 1 . Carepalxis tuberculifera C.\mbkidge. Plate XIII, Fig. 6. 



18S9. Carepalxis luberciilifera, Cambridge . . Biolog. Cent. Amer., Aran., p. 4S, iv., 9. 

 1890. Carepalxis tuberculifera, JIarx in Utt. . . Catalogue, p. 542. (Keyserling in litt.) 

 1892. Carepalxis tuberculifera, Keyserling . . Sjiinn. Amerik., Epeir., p. 50, ii., 40. 



Fe.male : Total length, 3.5 mm., but from the peculiar manner in which the animal 

 carries its abdomen, in a plane almost pei'pendicular to the cephalothorax, this length is 

 decejitive; cephalothorax, 2 mm. long, 1.5 mm. wide; abdomen, 3.3 mm. long, 2 mm. wide. 



Cephalothorax : The corselet is hidden by the overhanging abdomen, somewhat 

 rounded on the sides, truncated behind, smooth and sharply sloping to the base; the caput 

 is extremely high, the forehead towering far above the eyes, having a height nearly twice 

 as great as that of the face from the midrear eyes to the margin of the clypeus (Fig. 6b, 6c), 

 giving the front thus a triangular appearance; the color is dull brown, covered with golden 

 yellow hairs ; the forehead has two knobs about midway between MR and the crest. The 

 sternum is broadly shield shai>ed, rounded at the sides, bluntly rounded at the apex, covered 

 with grayish yellow pubescence, dark brown, with lighter shade in the centre ; the labium 

 is bluntly triangular ; the maxilhe gibbous, curved toward each other, somewhat longer than 

 wide. 



Eves : Ocular quad on a high squarish prominence ; the rear width greater than both 

 the front and sides; eyes about equal in size; MF separated by 1.5 diameter; MR by at 

 least two diameters. The side eyes are on slight tubercles placed far down on the side 

 margin of the clypeus; they are equal in size, somewhat less than the middle eyes, 



Philadelphia, A. D. 1893. 



