Zool.— Vol. I.] BANKS— MEXICAN ARACHNIDA. 249 



dibles reddish. Legs pale, tips of joints blackish above. Abdomen brown- 

 ish with a median row of silvery spots, and three large ones each side, some- 

 times blackish around the spots; venter dark, with a row of three pale spots 

 each side; sternum red-brown. The four M. E. form a square; the S. E. 

 touching, some distance from the M. E.; four teeth above on mandible, the 

 two middle ones the larger, two very large ones below; a very distinct furrow 

 on venter, nearer to the spinnerets than to the lung-slits. 



Two males; San Jose del Cabo. Differs from G. emer- 

 toni in smaller size and armature of the mandibles. 



EPEIRIDvE. 

 142. Gasteracantha cancriformis Linn. 



Epeira cancer Hentz., Spiders of the U. S., p. 126. 



Two specimens from San Quentin, two from Magdalena 

 Island, and one from Orizaba. 



143. Gasteracantha hexacantha Fabr. 



Gasteracantha velitaris Koch, Die Arach., IV, p. 33. 

 Gasteracantha rufospinosa Marx, Entom. Amer., Vol. II, p. 25. 



Many specimens from Tepic, Sierra Laguna, and Guay- 

 mas. 



144. Acrosoma funebre Marx ms. 



Female — Cephalothorax 2 mm. long; abdomen 5 mm. long. Cephalo- 

 thorax glossy black, mandibles blackish brown; maxillae black with the inner 

 margin white; labium blackish at base with a white tip; sternum glossy 

 black; first coxa; black, second and third pale yellow testaceous, fourth tes- 

 taceous with a black spot at underside. Abdomen black with fifteen white 

 spots on the dorsum, five pair on each side, two inside of these two rows, 

 side by side before the center, one larger at the center, and two behind the 

 center and before the posterior superior spines, which are spotted with white 

 at the sides; underside black with seventeen white spots— eight on each 

 side, and one in the posterior region between the inferior posterior spines. 

 Legs and palpi yellow, with a blackish ring on the distal end of the joints. 



Cephalothorax considerably longer than broad, with a round impression at 

 the base of pars cephalica. The four M. E. form a square which is slightly 



