200 Mr. Shuckard's Monograph of the Dorylidae, 



from any that I know. It is remarkable that this genus should have 

 suffered neglect so long as to have had but one species distinctly 



recorded. 



** Peduncle more or less convex, 

 f Transverse-quadrate. 

 Sp. 4. Lab. Halidaii, Shuck. Length 7 lines ; 



Expansion 14J lines. 

 Rufo-testaceus, pubescens: capite [clypeo, mandibulis antennisque exceptis) 

 nigro ; stigma alarum hrunnea: et abdominis pedunculo transversa' 

 quadrato, supra in medio convexo. 



Lab. Latreillii, Haliday. Linn. Trans., vol. xvii. p. 328. 

 Body reddish testaceous, pubescent, especially about the coxae, beneath the 

 peduncle, and towards the apex of the abdomen. Head black, except- 

 ing the clypeus, mandibles and antennae, which are of the same colour 

 as the body ; the latter are inserted nearer the middle of tTie face than 

 usual, the carinae behind which they are inserted terminating abruptly 

 near the anterior ocellus. The ocelli placed in a curve upon the vertex ; 

 the scape not much more than one-sixth the length of the whole an- 

 tennae: the mandibles small, leaving but a small aperture between them 

 and the clypeus. 

 Thorax very gibbous in front, as also at the scutellum : metathorax abruptly 

 perpendicular, slightly produced laterally : superior wings with their 

 stigma brown, marginal cell lanceolate, slightly acuminated from the 

 apex of the second submarginal, and scarcely larger than either of the 

 two first submarginals, which are also nearly equal in size : the first 

 transverso-cubital nervure straight, and the second cubital cell recei- 

 ving the recurrent nervure at about one half of its length, beyond which 

 the cubital nervure becomes a little thickened : legs short and very 

 slender. 

 Abdomen very shining : its first segment transverse-quadrate, and a little 

 wider than the second, the posterior angles truncated, and with a small 

 convex elevation in the centre of its superior surface, its ventral por- 

 tion scarcely produced ; the third and fourth segments slightly con- 

 stricted at their base, and the terminal one acutely vertically compressed 

 at its apex, where it has a deep fissure ; and the sexual organ protru- 

 ding beneath in the form of a slightly convex plate, deeply emarginate, 

 with the lateral processes very acute. 



In the collection of Capt. King, R.N. and Mr. Curtis. 

 This insect is from St. Paul, on the Brazilian coast. It is the 

 specimen examined by Mr. Haliday, and considered as the Labidus 

 Latreillii in his description of Capt. King's insects ; but that it is not 

 this insect, a comparison of its description with the preceding will 

 amply show. I have accordingly dedicated it to Mr. Haliday. In 

 the observations on the next species I shall mark its differences 

 from that. 



