368 Mr. W. C. Crawley on 



Odontomachus hcematoda, \j., var. palUpea, var. nov. 



^ . Differs from tlie typical form in being slightly larger, 

 more elongate, the scale slightly broader from back to front, 

 not tapering so gradually into the spine, and particularly in 

 colour, which is entirely ferruginous with the gaster darkest 

 and the mandibles and antennae lighter, and the legs entirely 

 yellow. The nearest described variety appears to be pallens, 

 Wheeler (Bahamas), which is smaller and with a narrower 

 and smoother scale. In var. paJUpes the scale is faintly 

 striate transversely in front and behind. Pubescence as in 

 typical form. 



British Guiana, 20.4. 15. 



II. Subfam. DoBYLiN^ (Leach). 

 Tribe E C l T l N l, Forel. 



Eciton (s. str.) hamatum, F., 1/, ^ . 



''This species and E. hurchelli, Wesfw., are the two 

 common species of' foraging ants' in British Guiana. Both 

 occur fairly commonly." 



E. (s. str.) hirchelU, Westw., $? . 



E. (Lahidits) coecum (s. str.), Ltr., V, ^ . 



"A common species, but owing to its haloit of burrowing: 

 beneath the surface of the soil it is not frequently observed." 

 Berlice, 3. 3. 15. 



E. [Acamntus) pilosum, Sm., ^. 



" This is not a common species of Eciton ; it seems to be 

 more partial to the forest areas.*' 

 Rockstone, 27. 12. 14, &c. 



III. Subfam. Myhmicinm, Lap. 

 Tribe PSEUDOMYEMINI, For. 

 Pseudomyrma biconvexa, For., ^ . 



"From bark of Sapium jenmanni, Hemsl.," Botanic 

 Gardens, Georgetown, 1. 3. 14. 



" A faiily common species. Formicarium unobserved." 



