DESCRIPTION OF MEXICAN ANTS. 



CEcodoma Mexicans Smith. 

 SMITH, Brit. Mus. Cat. Hym. Vol. VI, p. 185. 



Female. Length, about 1.00 in. Exp. wing, 2.00 

 in. Thorax one 

 half wider than 

 head, hairy, 

 without spines ; 

 side angles of 

 second node 

 acute : color 



ferrugin- 



dark 



ous; wings 



smoky yellow ; costal margin blackish. 



Worker major. Length, 0.50 in; Worker minor, 0.15 

 in. A spine on each lobe of back of 

 head. Two spines on thorax before ; 

 two projections between and two spines 

 on metathorax ; a spine on pleura, 

 above the anterior coxae. Mandibles 

 with about eight teeth ; color, dark fer- 

 ruginous ; color of minor worker yel- 

 low-red. Worker major. 



Cryptocerus nmltispinosus Norton (nov. sp.). 



Worker major. Length, 0.27 in. Color black, the 

 head and whole body dull with sparse coarse punctures, 

 from each of which arises a short shining white 

 hair. The produced sides of face, the anterior 

 angles of thorax, tips of all the spines and an- 

 terior corners of abdomen testaceous. Mar- 

 gins of head and of cheeks each angular, partly 

 covering the eyes, and extending forward above 

 in a sort of scale as far as the margin of nasus, 

 making the head nearly as wide before as behind ; nasus 

 and back of head emarginate ; corners of head angulate, 

 two spiuose tubercles on the occiput, which has an abrupt 

 declivity to hinder margin. Antennae short, setaceous, 

 base testaceous. Thorax twice as wide before as behind, 

 emarginate in middle, with two spinose angles on each 

 side, with a raised subangulate transverse connection ; a 



COMMUNICATIONS ESSEX INSTITUTE, VOL. VI. 



JULY, 1868. 



