CAMPONOTLNiE. 309 



interesting account of ants tending larvae is given at p. 164, 

 vol. iii (1888), of the Bombay Natural History Society's Journal. 



Keij to the Genera. 



A. Mandibles long, linear, cylindrical, bent at 



right angles and dentate at apex, denticulate [p. 313, 



on inner margins Mybmoteras, 



P). Mandibles not so formed. 

 a Antennse 12-jointed. 



a'. Maxillary palpi 6-joiuted. 



a-. Antennse inserted at a perceptible dis- 

 tance from posterior margin of clypeus. 

 d^. Thorax and node of pedicel not 

 dentate nor spinous, nor with the 

 angles markedly produced ; basal 

 two abdominal segments equal or 

 subequal in length. 

 d. Head not truncate anteriorly .... Camponotus, p. 347. 

 6*. Hi-ad truncate anteriorly ; very 



markedly so in the § maj Colobopsis, p. 342. 



¥. Thorax and node of pedicel spinous 

 or dentate, or with the angles 

 markedly produced ; basal segment 

 of abdomen much longer than 2nd 

 segment. [p. 382. 



rt*. Eyes entire, round or oval Polyrhachis, 



6*. Eyes truncate posteriorly Hemioptica, p. 380. 



//. Antennae inserted immediately above 

 posterior margin of clypeus, almost 

 touching it. 

 d. Antennal and clypeal hollows not 



confluent, distinct Prenolepis, p. 325. 



b^. Antennal and clypeal hollows con- 

 fluent. 

 «*. Ocelli absent. 



a'. 9 maj. very much larizer than [p. .337. 



^ min. ; eyes vei-y small .... Pseudolasius, 

 ¥. ^ maj. and ^ min. almost equal 



in size ; eyes moderately large. Lasii;s, p. 338. 

 b^. Ocelli present. 



«'. Node of pedicel rounded; 4th 



joint of maxillary palpi nearly [p. 312. 



twice as long as 5th Myrmecocystus, 



b^. Node of pedicel flat; 4th joint 

 of maxillary palpi only a little 



longer than oth Formica, p. .'J33. 



b' . Maxillary palpi 5-jointed CEcophylla, p. 310. 



b. Antennie 11-jointed. 



a . Maxillary palpi G-jointed. 



cr. Metanotum and node of pedicel more [p. 314. 



or less bispinous or bidentate Acantholepis, 



U^. Metanotum and node of pedicel without 



spines or teeth Plagiolepis, p. 319. 



//. Maxillary palpi 2-)ointed Ackopyga, p. 332. 



