1960] 
Evans — Bernbix u-scripta 
55 
ward. The egg of u-scripta measures about 4.5 mm. long. 
The egg hatches in about two days and the small larva remains at- 
tached to the fly pedestal by a glutinous thread for several days. Pro- 
visioning is fully progressive; that is, flies are provided each day up 
until the larva is full-grown and nearly ready to spin its cocoon. 
The wasp does not clear the fly remains from the cell, and they mere- 
ly accumulate in a mat on the bottom of the cell. Apparently about 
a week is required for completion of larval development. 
TABLE III. PREY OF BEMBIX U-SCRIPTA AT PORT ISABEL, TEXAS 
Family and species of fly Number taken 
Stratiomyidae 
Hermetia aurata Bell 1 
Tabanidae 
Tab anus texanus Hine 1 
Bombyliidae 
Aphoebantus sp. nr. hirsutus Coq. 6 
Lordotus gibbus gibbus Lw. 5 
L. gibbus striatus Painter 3 
Phthiria sp. 1 
Poecilanthrax lucifera Fabr. 3 
Villa parvicornis Lw. 2 
Asilidae 
Erax cressoni Hine 2 
E. tuberculatus Coq. 4 
Pleisosomma unicolor Lw. 1 
Psilocurus modestus Will. 2 
P. puellus Bromley 2 
Stenopogon ebyi Bromley 6 
Syrphidae 
Volucella fraudulcnta Will. 1 
V. unipunctata Curran 3 
V. sp. 1 
Otitidae 
A crosticta mexicana Cole 15 
A. sp. 1 1 
Muscidae 
Limnop/iora sp. 1 
Mydaea sp. 1 
Phyllogastcr cordyluroides Stein 5 
Sarcophagidae 
Sarco phaga johnsoni Aid. 4 
S. sp. 1 
Senotainia kansensis Tns. 1 
Tachinidae 
Archytas marmoratus Tns. 1 
CAiaetogaedia sp. nr. analis Wulp J 
Goniochaeta plagioides Tns. 1 
Opelousia obscura Tns. 1 
Phorocera tachinomoides Tns. 1 
Promasiphya confusa Aid. 1 
T dchinophyto sp. nr. vanderwulpi Tns. 3 
Xenoppia monela Rnh. 7 
