I!>f> Mr. ShuckarJ'8 Monot/raph of the Dorylida?, 



proximate affinitii Thus Rhogmtu by its two recurrent nervures 

 leads off to the MutilliddB, and from general habit Dorylus closely 

 approaches it : between the latter and Labidtu intervenes JEnictus, 

 which participates in the characters of both ; whilst finally, taking 

 them inversely, Labidus distinctly points towards Ponera amongst 

 the Social I [eterogyna. 



Genus 1. Labidus, Jurine. 

 DoRYLUB, Fab. partly \ 



Cii \i;. Body elongate, cylindrical. 



Head .-mall, short, transverse, flat. 



.Irtttiiiuc varying in length, usually setaceous, curved and inserted within 

 two facial projections (forming vertical carinas) upon the anterior mar- 

 gin of the nearly obsolete clypeus, the scape never more than one-fourlk 

 the length of the flagellum, the apex of which frequently extends as far 

 back as the insertion of the superior wings. 



Eyes large, lateral, subglobose, and very prominent. 



Ocelli large and very prominent, and placed in a curve upon the vertex. 

 Mandibles elongate, slender, arcuate, and forcipate, always leaving an open 



space usually semicircular between them and the clypeus. 

 Labrutn triangular, the apex rounded, and in repose shutting down upon 



and inclosing the internal tropin. 



Maxilla? ? 



Maxillary palpi two-jointed, shorter than the labial?* 



Labial palpi two-jointed, slender, the basal joint the longest. 



Labium triangular. 



Thorax ovate, gibbous : prothorax extending laterally to the insertion of 



the wings, which is at about half the length of the thorax : scutelliun 



transverse : metathorax perpendicular and abruptly truncated. 

 Superior wings usually as long or longer than the abdomen, rarely shorter, 



* Latreille throughout all his works says the " maxillary palpi are at 

 least as long as the labial, and consist of four or at least three joints." {Palpi 

 maxillares labialium saltern longitudine, articulis quatuor out ad minimum 

 tribus. — Genera Crustac. et Insect., iv. 123.) except in his portion of the 

 ' Regne Animal' of Cuvier, where he says, vol. v. p. 315, that they consist of 

 at least four joints : but he here further says of this genus, that the man- 

 dibles are shorter and less slender than in Dorylus; the reverse of which 

 is the case. Now all this implies very unsatisfactory uncertainty, and I am 

 therefore disposed to consider that Jurine is correct, and that the palpi are 

 constructed as stated in the text. I have unfortunately not had the oppor- 

 tunity of dissecting a specimen, as only single specimens of any species are 

 extant in any collection, and the extreme minuteness of the parts would in- 

 volve the certain destruction of the head: from the same cause I have been 

 unable to examine the male sexual organ, and to compare it with those of 

 the other genera; but this is the less necessary here, as the genus is otherwise 

 very obviously distinguishable from the rest. 



