262 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



trunks of trees searching for small cockroaches in the crevices of the 

 bark." 



Dolichurus stantoni (Ashmead) 



Natural Jiosts. — Allacta similis, nymphs, Hawaii (Williams et al., 

 1931 ; Zimmerman, 1948). 



Blattella litiiricollis, usually nymphs, Philippine Islands, Hawaii 

 (Williams, 19 19). 



Cutilia soror, nymphs, Hawaii (Williams et al., 1931 ; Zimmerman, 

 1948). 



"Phyllodromia" sp., Philippine Islands, Hawaii (Williams, 1918; 

 Bridwell, 1920). 



Experimental hosts. — "Field cockroaches," Philippine Islands 

 (Williams, 1944). 



Nesting site. — Readymade crevices or holes in ground ; porosity in 

 lava. Behavior. — The wasp seizes the cockroach by a cercus or leg 

 and stings it in the thorax. She (fig. 7, A) then drags the cockroach 

 to the nest by the base of an antenna. Wasp bites off distal part of 

 host's antennae. She deposits her egg on one of the host's midcoxae. 

 Nest is plugged with lumps of soil. The larva eats the entire host. 

 Development. — Eggs hatched in about a day and a half. Adults 

 emerged about 3 weeks later. About five generations per year. (Wil- 

 liams, 1918, 1919; Williams et al., 1931.) 



Dolichurus sp. 



Natural hosts. — Cockroaches, nymphs. South Africa (Bridwell, 

 1917). Adult female cockroach carrying an ootheca, France (Deleur- 

 ance, 1943). 



Nesting site. — Plant stem, or in ground possibly an old abandoned 

 nest of Ammophile. Behavior. — Bridwell noted that one wasp larva 

 ate two cockroach nymphs before pupating; the adult emerged about 

 4 months after cocoon formation. Deleurance observed the wasp close 

 its nest with small pebbles, balls of earth, and small dead branches. 

 The wasp egg was placed on the femur of the midleg. The prey in the 

 nest is alert when disturbed. Deleurance believed the wasp was a 

 variety of D. corniculus. 



Trirhogma caerulea Westwood 



Natural hosts. — Periplaneta americana and Periplaneta australasiae , 

 Formosa (Sonan, 1924) : The wasp stings a nymph about one inch 

 long and carries it to a suitable place (bamboo pipe) for oviposition. 



