INSECTA. 369 



Sp. Larra ichneumoniformis FABR., PANZER, Deutschl. Ins. Heft 76, Tab. 

 1 8, &c. 



Bembex FABR. Prothorax and feet as in the preceding genus. 

 Labrum exsert, often triangular, inflected. Mandibles narrow, 

 dentated on the internal side. Maxillae and labium often extremely 

 elongate, inflected. Body elongate, abdomen ovato-conical. 



Sub-genus embex LATE., (and Monedula ejusd.) Labrum trian- 

 gular. Maxillae and labium very long, linear, inflected, forming the 

 promuscis. 



Sp. Bemlex rostrata, Apis rostrata L., PANZER, Deutsckl. Ins. Heft i. Tab. 

 10 ; DUMER. Cons. gen. s. 1. Ins. PI. 30, fig. 10; LATR. Ann. duMus. xiv. 

 PI. 16, figs. 9 13; black, felty, with yellow feet, and light greenish 

 yellow transverse bands on the abdomen ; 9 10 lines long. The female 

 digs holes in the sand, and lays in each of them an egg with a sufficient 

 quantity of Diptera (especially Eristalis tenax) for feeding the larva. Most 

 of the remaining species are at home in warm regions ; but the species 

 quoted occurs occasionally all over Europe, even in Sweden. 



Sub-genus Stizus LATE., JUEINE. Labrum small, semicircular. 

 Maxillae and labium porrect, not inflected, nor elongato-liiiear. (In- 

 termediate lacinia of labium elongato-cordate. Maxillary palps 

 somewhat long, extended beyond the apex of maxilla.) 



Sp. Bembex ruficornis FABR., Ent. syst., Larra ruficornis ejusd. Syst. Piez., 

 Cuv. R. Ani. ed. ill., Ins. PI. 121, fig. 3 ; habit, in south of Europe and 

 Numidia, &c. 



Sphex LIN. (exclusive of many species). Prothorax continued 

 aterally as far as the anterior wings, narrowed forwards, resembling 

 joint or node. Labrum scarcely or not at all exsert. Three com- 

 ete cubital cells. Antennas slender, with joints elongate, often, 

 t least in females, convolute or arcuate. Posterior feet very long, 

 h tibiae and tarsi spinose. Abdomen adhering to thorax by a 

 ong petiole. 



* With mandibles edentulous. 



Sub-genera : Pelopoeus LATE,, FABE., Podium FABE., (Trigonop- 

 sis PEETY), Podium LATE, (not FABE.), Ampulex JUE., LATE. 

 (Chlorion FABE. in part). 



* With mandibles on inside dentate. 



Sub-genera : Dolichurus LATE., Trirogma WESTW., Aphlelotoma 

 VOL. I. 24 



