348 INSECTS. HYMENOPTERA. 



2. Prothorax almost as long as broad. 



A. Mandibles without teeth on the internal side; head convex, at least posteriorly. 



Gen. SALIUS. 



B. One tooth at least on the internal side of the mandibles ; head depressed ; ocelli 

 very small, separate. 



Gen. PLANICEPS. 



Gen. POMPILUS, Fab. Lat. Sphex, Lin. 

 Posterior feet long, with the legs spinous ; first segment of the 

 trunk square, generally transverse, the posterior margin almost 

 straight, and extending to the origin of the wings ; antennas 

 slender, filiform or setaceous, composed of elongated joints ; 

 abdomen ovoid, on a very short pedicle, nearly sessile ; max- 

 illary palpi much longer than the labial, and with unequal 

 joints ; three complete cubital areolae, the second and third 

 with a recurrent nerve ; labrum concealed wholly or partially. 



The insects of this, genus are very lively, flying every moment from one place to 

 another, and running rapidly, agitating their wings and antenna. They are found 

 in greatest numbers in warm countries, and in dry and sandy places. 



P. annutatus, Lat. Black, with the head, anterior extremity of the 

 thorax, and the base of the abdominal rings yellow ; wings red- 

 dish, with the extremity black. Inhabits South of France, Italy, 

 Spain, &c Lat. Gen. iv. 64. 



P. viaticus, Lat. Black, with the first three segments of the abdo- 

 men red, bordered with black. The female stings severely. 5 

 lines long. Inhabits Europe. Shaw, vi. pi. 93. 



TRIBE IV. SPHEGIDES, Lat. 



Prothorax forming a kind of neck in the form of a joint or 

 knot, narrowed before ; base of the abdomen narrowed into a 

 long pedicle j three complete cubital cells. 



I. Mandibles dentated on the internal side. 



1. Palpi filiform, of almost equal length ; median division of the labium long, bifid, 

 or deeply notched. 



A. Jaws and lip much longer than the head, forming a kind of proboscis or spuri- 

 ous trunk, geniculate towards the middle ; palpi very slender, with the joints cy- 

 lindrical. 



Gen. AMMOPHILA, Miscus, (Jurine; the abdomen petiolate.) 



B. Jaws and lip shorter, or scarcely longer, than the head ; almost all the joints of the 

 palpi obconical. 



Gen. SPHEX, PRONJEUS, CHLORION. 



2. Maxillary palpi setaceous, much longer than the labial ; intermediate division of 

 the labium as long as the lateral ones, or slightly longer, almost entire. 



Gen. DOLICHURUS. 



II. Mandibles without teeth on the internal side; palpi and labium as in the pre- 

 ceding division. 



Gen. AMPULEX, PODIUM, PELOP^EUS. 



Gen. SPHEX, Lin. Lat. Ichneumon, Geoff. 

 Mandibles dentated on the internal side ; antennae inserted to- 



