SrHEGIDAC. 87 



tlae mesonotnm by a deep division, propodeutn elongate, 

 wings with three submargiual cells ; abdomen varying much 

 in the length of the petiole, apical dorsal valve in the ? 

 without a distinct pygidial area ; legs with the tibiae more 

 or less spinose, tarsi densely so, anterior tarsi pectinated in 

 the ? . 



This is an extensive and almost cosmopolitan genus, of 

 which only four species occur in this country ; these form 

 their nests in the ground, provisioning them with spiders 

 or caterpillars accoi'ding to the species. 



The British species of this genus may be divided into 

 three subgenera, as shown in the following table of 

 species : — 



(4) 1, Petiole of abdomen very long, the first seg- 



ment scarcely widened at the apex. 

 (3) 2. Third submiirginal cell not petiolated (Siibg. 



Ammop/iilo, Kirb) sabuiosh. 



(2) 3. Third submargiual cell petiolated (Subg. 



UiscilS, Jlir.) CAMFESTUIS. 



(1) 4. Petiole of abdomen not very long, the first 

 segment largely widened at the apex. 

 (Subg. Psammophiht, Dahlb.) 



(6) 5. Propodenm rngose not diagonally striate . hirstjta. 



(5) 6. Propodenm diagonally striate . , . luiaria. 



A. sabulosa, Linn. — Black, the apex of the first, the 

 whole of the second, and the base of the third abdominal 

 segment red, with a black dorsal spot on the first and 

 second in the $ ; head and thorax clothed with pale hairs, 

 face very narrow and golden pubescent in the S > mesouo- 

 tum rugosely punctured, anterior wings dusky at the apex, 

 with the third submargiual coll trapezoidal or triangular, not 

 petiolated, propodenm irregularly rugose; abdomen clothed 

 with a fine glaucous pubescence, first segment with a \erj 

 long glabrous petiole, only widening slightly posteriorly 

 after its juncture with its dorsal valve, the rest of the abdo- 

 men elongate oval, about as long as the first segment, 

 apical ventral valve in the ? hairy at the side.^i, armature of 

 the S with the stipites t-owards the apex fringed inwardlv 



