74 
MONOGRAPH OF THE DORYLIDES. 
the distinct basal segment of the abdomen *. Considering, therefore, 
the Dorylides as a section of the Formicidse, and having shown 
that Typhlopone also belongs to the same family, it may be urged 
that there are good grounds for considering with Mr. Shuckard that 
Typhlopone is composed of female Labidi. I do not think that this 
is the case, for the reasons which I have given in my observations on 
that genus above referred to, but I am far from willing to assert 
that such may not ultimately prove to be the case. 
Labidus, Jur. 
Of this genus, composed, as it was supposed to be until last 
year, of only a single species, Mr. Shuckard gave an excellent 
Monograph, including descriptions of ten species (exclusive of 
L. mediatus). By the kindness of W. Burcliell and J. Miers, Esqrs., 
I am, however, enabled to double the number of species; several 
of my new species possessing curious characters not hitherto 
noticed. I may likewise add, that, with the exception of Perty’s 
wretched figure of the species he named Labidus Latreillii, no 
illustration has yet been published of the genus, nor do we find in the 
latest works the internal organs of the mouth correctly described. 
These I have figured under the letters A and B, and they will be 
found to resemble the corresponding parts in Typhlopone, as figured 
by me in my “Introduction to the Modern Classification of 
Insects,” vol. ii. p. 226, fig. 86, 19, 20. 
Section A.—Peduncle subtriangular, with the sides elevated. 
Species!.— Labidus Fargeavii , Shk. (Mon. Dor. p. 11.) Kufo-fusco-hirtus; capite, autennis, 
thorace femoribusque nigris, eastern rufo-fuscus, abdomine supra rufo-sericeo, pedunculo 
supra canaliculato, venis alarum fulvo-rufis. Long. Corp. environ 14 lig.=17 lin. angl. 
mens. fere. 
Syn. _ Labidus Latreillii, Saint-Farg. H. N. Hyin. 1. 229. nec Jurine. 
Inhabits the province of St. Catherine, Brazil, on the sea-coast. 
Species II .—Labidus Burchellii, W. (Plate 20, fig. 1.) Piceo-niger, pubescens et pilosus, 
abdomine fulvo-brunneo, pedunculi lateribus vaide elevatis mandibulis subrectis, tibiis 
tarsisque posticis gracilibus. Long. Corp. lin. 9|. Expans. alar. lin. 18|> 
Taken at Santos, Brazil, by W. Burcliell, Esq., on the 30th October, 1826, at 9 o’clock p.m. 
This very distinct $pecie 3 has the head and thorax *of a dirty brown colour and pubescent, and 
the abdomen fulvous-brown and not shining, the body beneath and at the sides clothed 'with 
long slender reddish hairs. The head is large, and the ocelli minute. The mandibles are long, 
nearly straight, the tips only being bent round, (Fig. 1 a). The thorax is clothed with a dirty 
luteous pubescence, it is scarcely broader than the head, and not gibbous in front; the abdo¬ 
minal peduncle is subtriangular, the sides very much elevated, the hind angles acute and 
produced; the extremity of the abdomen is deflexed; the antennaj and legs are long and 
slender; the femora blackish ; the tibise pitchy, but on the upper side reddish ; the tarsi testa¬ 
ceous, the posterior tibire and tarsi slender, the tarsi having a minute tubercle at the base; 
within (fig. 1 b ; 1 c, ungues); the wings are very* slightly stained with brown, and almost 
hyaline, the veins brown; the marginal cell is angulated behind, and the cubital vein is not 
thickened behind the second submarginal cell. 
* Other characters which these insects possess in common with the Formicidse are detailed 
by St.-Fargeau and Haliday. 
