with descriptions of several exotic species of Ants. 87 
tum. Palpi maxillares et labiales biarticulati ; gracillimi brevis- 
simi, apice seta instructi. 
Thorax valde angustus, prothorace mediocri ; mesothorace majori. 
Abdomen magnum fere circulare subdepressum segmentis basalibus 
duobus nodos duos formantibus, segmento proximo maximo. 
Pedes graciles tibiis 4 posticis ecalcaratis, unguibus tarsorum sim- 
plicibus. 
Species unica. Solenopsis mandibularis, Westw. 
Tota castaneo-fulva nitida tenuissime punctata, hirta; oculis, mar- 
gine antico capitis acuto, mandibulisque nigris ; abdominis apice 
fusco, mesothorace utrinque in tuberculum conicum elevato ; 
nodo 1™° pedunculi abdominalis elongato, apice elevato-conico, 
2740 brevi subrotundato. 
Long. corp. lin. 3. 
Habitat in America Afquinoctiali. D. L. Guilding. 
In Mus. D. Hope. 
This insect is so closely allied to the Pheidole providens, W. ( Atta 
providens of Col. Sykes, figured in the Transactions of the Entomo- 
logical Society, vol. i. pl. 13. fig. 5.), that it can only be regarded as 
a geographical subgenus, distinguished chiefly therefrom by the pe- 
culiarity of its antenne and the smooth and glossy body. As the 
former has not hitherto been characterized generically, I take this 
opportunity of doing so. 
PHEIDOLE, Westw. 
Sub-genus Asiaticum Solenopsidi proximum. 
Caput maximum posticé emarginatum anticé haud bituberculatum, 
striolatum obscurum, anticé linea utrinque obliqua impressa 
versus oculos ducta in quibus insident antenne 12-articulate, 
graciles breves, articulo 2"°° sequenti majori, tribus ultimis mag- 
nis clavam formantibus. Mandibule crass intis concave extis 
curvate apice truncato (in fig. supr. cit. erroneé dente medio 
depict). 
Labrum, maxillz, labium, mentum, palpi, pedes, pedunculus et ab- 
domen ut in Solenopside. 
Species unica, Pheidole providens, W. 
Aita providens, Sykes, loc. cit. supr. 
Habitat in India Orientali. D. Sykes. 
The following are descriptions of the individuals of Typhlopone 
which have fallen under my notice, and which are distinct from those 
described by Mr. Shuckard :— 
Species typica, Typhlopone fulva. 
Luteo-fulva nitida tenuissime punctata, capite postice nonnihil an- 
gustiori, margine postico parum emarginato, margine antico ni- 
gricanti, tuberculis duobus mediis in lineas elevatas posticé 
productis desinentibus et inter has carinas canali impresso 
posticé ad tertiam partem capitis ducto et gradatim terminato ; 
antennis in fossulis duabus mediocriter impressis, insertis : cas- 
taneis 1]-articulatis articulo 1™° fulvo; ultimo articulis tribus 
