DESCRIPTION OF GENKKA AND SPECIES. 171 



brown on tlie sides, and a brighter )'e!low band along the margin; dorsum slightly pubes- 

 cent, except at the caput, which is well covered witli yellowish gray hairs. Sternum shield 

 shape, about as wide as long, covered with yellowish hairs, brown, with a broad yellow 

 median band. Labium and maxillae light yellow, and as in Ejjeira. 



Eyes: Ocular quad on a central prominence, wider in front than behind, the side 

 about as long as front; eyes about equal in size; MR amber yellow, MF blackish; MF 

 separated by about 1.5 diameter; MR by le.ss than 1 diameter; side eyes on slight tubercles, 

 barely contingent; SF somewhat larger than SR ; MF separated from SF by about or less 

 than their area, and set close to clypeus margin, less than one diameter MF therefrom. 

 Front row recurved, the longer rear row slightly procurved. 



Legs: 1, 2, 4, 3; stout, well provided with bristles and hairs, and rather sparingly with 

 blackish spines; the color is yellow, with brown annuli at tips of joints and middle of 

 tibia and metatarsus. Paljis colored and armed as legs; mandibles conical, tapering to 

 widely separated tips ; the base rounded and with a brown chitinous cog. 



Abdomen : Triangular ovate, almost as wide as long, widest at the base ; carried nearly 

 perpendicularly ; dorsum arched to distal spinnerets. Color yellow, with a cretaceous folial 

 pattern, resembling rudely a butterfly, with outspread wings, on the base, and the body 

 extending backward along the median line. This figure is margined with black, and irreg- 

 ular lines of black jiass from the dorsum along the sides toward the venter, leaving the 

 sides marked by a broken band of yellow. Four brownish lines pass from the middle of the 

 dorsum longitudinally to the apex, and spots of black are symmetrically arranged on either 

 side receding to tlie spinnerets. In front the abdomen is marked by two or three rows of 

 black circular spots; the whole surface is strongly reticulated. The venter has a broad 

 patch of white or whitish yellow, marked in the middle by a lateral band of blackish 

 brown ; the epigynum (Fig. 8a, 8b) is marked by a decided scapus. 



Male: Closely resembles female in color and markings; the inner apical half of 

 tibia-II provided with a donble row of sti-ong clasping spines, and somewhat thicker than 

 tibia-I. The color, in some examples at least, tends to be lighter than in the female, and 

 the markings upon the abdomen are more cretaceous. 



DisTKiBUTioN : My collection places this species from New England southward along the 

 Atlantic seaboard, and westward through Pennsylvania and Ohio, as far northwest as Wis- 

 consin (Professor Peekham) ; along the Pacific Coast at Santa Cruz, Cal. (Mr. Harford), 

 and San Diego (Mra. Eiigenmann and l\Irs. Smith). It will probably be found distributed 

 throughout the entire United States. 



No. 30. Epeira labyrinthea Hentz. Plate VII, Figs. 10, 11, 12. 



1847- Epeira labyrinthea, Hentz . . . J. B. S., v., 471, pi. xxxi., 3. 



1875. Epeira labyrinthea, Hentz .... Sp. IT. S., p. Ill, pi. xiii., 3. 



1884. Epeira labyrinthea, Emerton . . N. E. Ep., p. 314, pi. xxxiv., 8. 



1889. Epeira labyrinthea, McCooK . . . Amer. Spiders and their Spinningwork. 



Female: The specimens vary much in size, from the large examples on the Pacific 

 Coast to those which inhabit the Atlantic Coast and interior; I descritie from the latter. 

 Total length, 5..5 (8) mm.; abdomen, 3.5 (5.5) mm. long, 2.5 (6) mm. wide; cephalothorax, 

 2.3 (3) mm. long, 2 mm. (2.5) mm. wide. A large female from the Pacific Coast measures 

 7 mm. long, of which the abdomen is 4.5 mm. long by 4 mm. wide ; the cephalothorax, 

 3 mm. long, by 2.3 mm. wide in the middle, narrowing at the face to one mm. 



CErHALOTHORAX : Blackish brown, with ligliter yellow patches on corselet and face; 

 the margin of lighter color; the caput, especially around the eye space, covered with long, 

 white, bristlelike hairs; sternuui shield shape, pointed at the apex, but little longer than 

 broad, elevated in the middle, traversed by a wide yellow band, the margins of which are 

 brown ; the surface covered with hairs and bristles, and broken by slight sternal cones ; 

 the lip more than half the length of the maxilK'c, which are rounded and as wide as or 

 wider than long; colored as the sternum, except lighter tips. 



