92 TRAVELS AMONGST THE GREAT ANDES. 



HOLCOPONERA, gCU. no\'. 



Head quadrangular, lunger than broad. Eyes (jval, small, situated a 

 little behind the middle of the head. Ocelli present. Antenna^ 12 -jointed. 

 First joint of flagellum globose, longer than second. Mandibles triangular, 

 without latei'al teeth, apical tooth scarcely sej^arated from the inner edge. 

 Clypeus incised broadly at the apex, conca^•e, not sej)arated from the rest of« 

 head. Frontal lamina? dilated, extending backwards to the middle of the 

 eyes, rounded in front, converging towards the eyes behind ; laterally form- 

 ing a receptacle into which the entire scape can be retracted. Frontal 

 fovea large, deep, oval Ijehind, open in front, extending into the frontal area 

 which is not defined from the clypeus. Meso- and metanotum without a 

 suture. Petiole longer than broad, contracted somewhat at the sides, con- 

 cave above, separated from the 1st abdominal segment by a belt-like con- 

 striction ; carinated beneath in the middle, a l)lunt tooth at the base. A 

 belt-like constriction between the 1st and 2d abdominal segments. Claws 

 simple, dilated at the base. Head, thorax, petiole and 1st abdominal seg- 

 ment deeply longitudinally sulcated. 



The most remarkable peculiarities of this genus are the great develop- 

 ment of the frontal lamina', which are greatly dilated, and the deeply 

 sulcated head, thorax and base of abdomen. There are only 9 or 10 of 

 these furrows on the mesonotum, and 7 on the petiole above. Otherwise 

 its affinities appear to be with Pachycondyla, but that difi'ers from it in the 

 toothed mandibles, in the form of the thorax, etc. In Mayr's talile of 

 genera (Verli. z. b. Wien, 1862, p. 713) it comes in between 9 and 10. 



8. Hokoponera JFhymperi, sp. n. 



Hab. Guayaquil (indoors). A single specimen. 



Black : mandibles and more or less of clyjoeus, base and 2d joint of 

 anteuuEe, piceous ; apical joint of antenna; fulvous; tibise (except at base 

 and apex) white ; four apical joints of tarsi and extreme apex of abdomen 

 ferruginous. Mandibles shining, longitudinally stiiated, the biting edge 

 smooth. Fi'ontal fovea finely striated ; head in front of eyes striated ; scape 

 finely striated ; flagellum becoming gradually thicker towards the apex, 

 sjDarsely covered with a depi'essed pubescence, last joint conical at apex, 

 double the length of preceding. Thorax compressed laterally, the middle 

 contracted. Above the 1st 2)air of legs is a fine semi-periaendicular suture ; 

 above the 2d a Avidei', more oblique and curved one ; behind the first of 

 these sutures the pleurae are longitudinally striated. The metanotum behind 

 is smooth, aciculated, with a slight slope, united to the petiole in the middle ; 



