MANUAL OF NATURAL HISTORY. 229 



II. TBIBE. FOSSORIAL-HYMENOPTERA (Fossores). 



Fore-wings not folded; larvae solitary, feeding 



on other insects. 



13. FAMILY. Spine-tailed Wasps (Scoliidae). An- 

 tennae short, thick, more or less serrated and 

 convolute in the females ; collar laterally di- 

 lated, extending as far as bases of wings ; 

 abdomen ovate, peduncle short ; abdomen of 

 males ending in three spines ; legs short, ro- 

 bust ; tibiae thick, spinose, or denticulated ; 

 both sexes winged. Burrow in sand. 



14 FAMILY. Parasitic Spine-tailed Wasps (Sapy- 

 gidse). Antennas long, straight, more or less 

 clavate ; collar laterally dilated, extending 

 as far as bases of wings; abdomen ovate; 

 peduncle short ; legs slender ; fore-legs not 

 ciliated in the females ; both sexes winged. 

 Parasitic in nests of bees ; live and burrow 

 in sandy situations. 



15. FAMILY. Dark-winged Sand-Wasps (Pompi- 



lidae). Antennae filiform, often convoluted in 

 females ; collar laterally dilated, extending as 

 far as bases of wings, transversely or longi- 

 tudinally quadrate ; abdomen more or less 

 oval, attached to thorax by a short peduncle ; 

 legs very long ; fore- wings with two or three 

 perfect sub-marginal cells. Burrow in sandy 

 places. 



16. FAMILY. True Sand-Wasps (Sphegidae). An- 



tennae filiform, often convoluted in females ; 



