—s TT 
DESCRIPTION OF GENERA AND SPECIES. 255 
pubescent; the mandibles are conical, thick at the bases, arched to the tips; dark glossy 
brown, pubescent on the inner faces; on either side of the base they are raised into a 
process or cog which fits against a corresponding notched projection in the dewlap of the 
face; palps armed and colored as legs. 
Aspomen: Cylindrical, widest at the base, compressed in the middle, again widening 
towards the apex, where it is one-half the width of the base; the front overhangs the 
cephalothorax, and the apex projects but little beyond the spinnerets, which are at the base 
of the high apical wall; the color, as far as can be noted from the imperfect specimen, is 
light brown, with a simple yellow folium extending the entire length of the dorsum, widest 
at the base and divided on the median. line by a ribbon of brown; it thus presents the 
appearance of two yellow bands traversing the dorsum, and uniting in front like a tuning 
fork. A band of yellow crosses the base above the cephalothorax, and directly in front are 
curved markings, which extend along the sides in an interrupted band of yellow rounded 
and elongated spots. The venter is velvety brown, with bright yellow spots arranged five 
on either side, and two directly on the median next the epigynum, which is simply a 
semicircular flap projecting over the genital cleft. 
Disrripution: One specimen, collected at Fort Buchanan, Arizona. Dr. Marx, in his 
Catalogue, also locates it at Mariposa, California. It will probably be found well dispersed 
along the Pacific Coast, in the more tropical parts thereof. (Marx Collection.) The speci- 
mens described by Leach and Fabricius are from China, and there is little doubt that the 
species is widely distributed along the coasts of Asia, whence, it may be, it was transplanted 
to America, unless one may choose to suppose a reverse direction of movement. 
No. 108. Nephila clavipes (Lixnzus). Plate XXIV, Fig. 1. 
1758. Aranea clavipes, Linnmus . . . . Systema Natura, i, ii, p. 1034, n. 27. 
1775. Aranea clavipes, Fasricius. . . . Systema Entomologiz, ii., p. 420, n. 50. 
1778. Aranea fasciculata, Dn Grrr . . Mem, I’Hist. Nat. des. Ins., vii., p. 316, No. 2, 
: pl. xxxix., 14. 
1806. Hpeira clavipes, WALcKENAER . . Hist. Nat. des Aranéides, fasic. i., F, 1, 2. 
1839. Nephila fasciculata, Koon . . . . Die Arachniden, v., p. 30, pl. 152, Fig. 355. 
1842. Hpeira clavipes, WauckeNarr . . Hist. Nat. Insect. Apt., p. 95. 
1890. Nephila fasciculata, Marx. . . . Catalogue Described Aranee, p. 551. 
Femate: Total length, 22 mm.; cephalothorax, 9 mm. long, 6.5 mm. wide, face width, 
5 mm.; abdomen, 14 mm. long, 6 mm, wide at the base, and of nearly equal width 
throughout, but somewhat diminished at the apex, which is rounded and projects over the 
spinnerets. 
Crrnatormorax: A long oval; slightly compressed at the truncated apex, flattened on 
the summit of the corselet by the deep circular fosse; color blackish brown, covered 
(apparently) with silvery white hairs, especially long on the sides. The head is slightly 
elevated, wide at the face, and upon the base of the caput are two strong conical spurs. 
The sternum shield shaped, the basal width about equal to the length; sternal cones dis- 
tinct, and one especially prominent in front of the labium, as in Nephila Wilderi; the 
margins are thickly covered with yellowish, bristlelike hairs; the labium and maxillie 
normal, and covered with long, curved, blackish bristles. 
Eyes: The ocular quad upon a prominence, much eleyated in front; sides longer than 
width, and rear wider than front; MF larger than MR, and separated by about 1.5 diameter ; 
MR separated by 2.5 to 8 diameters; the side eyes on strong tubercles, about equal in size, 
separated by 1.5 diameter; SF removed from MF about 1.3 the area of the latter, or 2.5 to 
3 times the intervening space. The clypeus height is about 2.5 diameters of MF. The front 
eyerow is slightly recurved, the rear slightly procuryed. 
* Walckenaer has pointed out what appgars to me to be a fact, that, in some way, the plate numbers 
of Koch have become confused. Figure 355 is undoubtedly intended for the above species, not for the one 
bearing the plate name of ‘‘ Nephila clavipes,” as stated in the plate. 
