GOG Mr. F. Smith's descriptions of 



transverse and each forming a spine that carves backwards. 

 (Fi-. 2, §. PI. xr.) 

 Hah. — Mexico. 



3. Cnjjdoccrus jucundus. 



"Worker. — Length 2 Hnes. Black, ])nncturcd, each 

 puncture having a pale shining seta ; the head oblong and 

 narrowed anteriorly ; the lateral margins before the eyes 

 broadly ])ale rufo-testaceous ; the antennas of the same 

 colour. Thorax narrower than the head ; transverse an- 

 teriorly, slightly arched ; the lateral angles acute, gradually 

 narroAved to the mctathorax, with the margins narrowly 

 pale testaceous ; about the middle, slightly contracted, Avitli 

 a minute tooth in the middle of the contraction ; the 

 lateral margins of the mctathorax with two minute teeth ; 

 the tibiii^ and tarsi pale rufo-testaceous. Abdomen heart- 

 shaped, pale rufo-testaceous at the base ; the nodes of the 

 l)ediuicle transverse and produced laterally into a pale 

 s^jine, curved backwards. (Fig. 3, ^. PI. XI.) 



Hah. — Mexico. 



4. Cryptocerus varians. 



Worker. — Length 2 lines. Varying in colour from 

 l>ale yellow to black-broAvn ; in the dark specimens the 

 margins of the head are anteriorly reddish, as are also the 

 legs, antenna^ and sides of the abdomen toAvards the base. 

 Ilead and thorax ]:)unctured ; the latter oblong, Avith a 

 transverse suture a little beyond the middle ; the anterior 

 lateral angles acute ; the margins before the suture Avith 

 two blunt teeth ; behind the suture the margins are first 

 produced into a small sharp tooth, and then suddenly nar- 

 roAvcd to the apex of the mctathorax. Abdomen oblong- 

 ovate, deeply cmarginate at the base ; the sides narroAvly 

 margined. (Fig. 4, §. PI. XL) 



Hah. — Cuba. 



5. Cryptocerus pallidicephalus. 



Female. — Length 3.^ lines. P>lack, Avith the hcad,tibi:\3 

 and the base of the abdomen laterally, and a subovatc 

 macula on each side near its apex, ochraceous. Head 

 oblong, rather widest in front, the margins raised, dish- 

 shaped ; covered Avith large shalloAv pmictures ; the eyes 

 and head beneath black ; the antenna3, with the scape, pale 

 ferruginous, and the Hagellum black. Thorax punctured, 



