HYMENOPTERA. 195 



the mesotliorax tuberculate ; the metathorax with the basal late- 

 ral angles rounded, and the apical ones produced into long stout 

 acute spines. Abdomen ovate ; the first node of the peduncle 

 rugose, much narrower than the second, which is truncate at 

 the base, rounded at the sides and behind. 



Hab. Brazil (Ega). (Coll. H. W. Bates.) 



7. MERANOPLUS DIFFORMIS. B.M. 



Worker. Length 1 line. Head and abdomen reddish-brown ; 

 antennae, mandibles, thorax and legs pale ferruginous ; the head 

 oblong, with a number of shallow depressions above ; the lateral 

 margins deeply contracted about the middle, opposite the eyes, 

 the sides expanded and rounded before the contraction and nar- 

 rowly margined behind it ; the vertex emarginate behind. Tho- 

 rax with depressions on the disk, rounded in front and obliquely 

 truncate behind ; a deep contraction between the meso- and me- 

 tathorax, three obtuse teeth or spines on the margins on each 

 side ; the metathorax with a longitudinal depression in the centre ; 

 the legs elongate, without spines or hairs. Abdomen subglo- 

 bose, widest towards the apex ; the first node of the peduncle 

 small and transverse, the second large, subglobose, and with a 

 depression above ; there is also a central depression at the base of 

 the abdomen. 



Hab. Santarem. 



8. MERANOPLUS SINGULARIS. PI. XIII. f. 6-10. 



Worker. Length 2J lines. Reddish-brown, rugose and his- 

 pid. The female is a little larger, of the same colour, and simi- 

 larly rugose and hispid. 



Genus 3. CATAULACUS. 



Formica, pt., Latr. Hist. Nat. Fourm. 275 (1802). 

 Cryptocerus, pt., St. Farg. Hym. i. 171 (1836). 

 Cataulacus, Smith, Mon. Crypt. Trans. Ent. Soc. Lond. 2nd ser. 

 ii. (1853). 



1. CATAULACUS TAPROBAN^E. 



Cataulacus Taprobanse, Smith, Mon. Crypt. Trans. Ent. Soc. 

 2nd ser. ii. 225. 1. pi. 20. f. 10$, 



Hab. Ceylon. 



K 2 



