- 
388 Prof. Westwood’s description of a 
inciso pro receptione calcaris. Pedes 4 postici longiores 
et graciliores, tibie calcari unico fere longitudine articuli 
1mitarsorum, apice unguibus duobus; singulo intus prope 
basin spinula tenui armato. 
Dyscolesthes canus, n. 8. 
Statura et habitus Andrene minute. Totus niger, 
nitidus, punctatus; griseo valde setosus; antennis 
testaceis; segmentis abdominalibus postice piceo-mar- 
ginatis. Long. corp. 4 lin. Expans. alar. 63 lin. 
Hab. Chili (eed). In Mus. Hopeiano Oxonie. 
It is unfortunate that our knowledge of this curious 
insect is confined to a single individual of the male sex. 
That it belongs to the Aculeate division of the order 
Hymenoptera may be affirmed from the structure of the 
13-jointed antenne ; in the very minute size, however, 
of the basal joint the insect disagrees with the great 
proportion of the aculeate species, there being no trace 
of geniculation; whilst the length of the antenne, as 
well as the number of joints, clearly show that the 
insect is a male. It is in the ant genus Myrmecia, from 
New Holland, that we find somewhat similar male 
antenne, but the whole form of this insect and the 
dense coating of greyish white sete are not found in any 
other species of Formicidae, from all of which this insect 
differs in the absence of one or more constricted segments 
at the base of the abdomen. ‘The construction of the 
lower parts of the mouth seems again to point to the 
most aberrant of the lormicide, several of which were 
described by myself in the ‘ Annals of Natural History’ 
for 1840, vol. vi. In the genera T'yphlopone, Anomma, 
and Solenopsis, we find extremely minute maxillary 
palpi composed of only two apparent joints. The legs 
are well developed, but the curious spur of the anterior 
tibie differs from that of any hymenopterous insect with 
which I am acquainted; the fine tooth with which each 
of the tarsal ungues is furnished merits attention, 
whilst the very curious structure of the wings, the 
ereater portion of which are quite hyaline, colourless, 
and apparently veinless, but with a large black stigma, 
is quite unique. We find indeed in Meria and some of 
the Proctotrupide the veins are restricted to the base of 
the wings, and in some of the latter there is a large 
black stigma; but the whole character of this insect 
