1191] Rohwer — Nejv Names of Sphecoid Wasps 153 



1910. Crawford, J. C. Proc. U. S. Nat. Mus., 38, May 3. 

 Brues, C. T. Psyche, XVII, June. 

 Fiske, W. F. Parasites of the Gypsy and Brown-tail Moths introduced 



into Massachusetts. Boston (State Forester's Office), p. 55, table V. 

 Fiske, W. F. and A. F. Burgess. Jour. Econ. Ent., Ill, October. 

 Gahan, A. B. Canadian Ent. 



Girault, A. A. Journ. N. Y. Ent. Soc, XVIII, December. 

 Howard, L. O. Bull. Bur. Ent. Tech. Ser., No. 19, U. S. Dept. Agric, 



January. 

 Johnson, F. and A. G. Hammar. Bull. Bur. Ent., No. 89, U. S. Dept. 



Agric. 



TWO NEW NAMES OF SPHECOID WASPS. 



By S. A. Rohwer, 

 U. S. National Museum, Washington, D. C. 



The following two names purposed by Billberg in 18*20 have 

 generally been overlooked by Hymenopterists. 



Genus Ammobia Billberg. 



Ammobia Billberg, Enumartio Insectorum, 1820, p. 105. 

 Type. — Pepsis argenfafa Fabricius. 



Chlorion (Ammobia) umbrosum (Christ.). 

 Syn. — Proterosphex H. Fernald. Ent. News, vol. 16, 1905, p. 165. 



This genus was originally treated as follows (Eg. equals Billberg) : 



" G. Ammobia Eg. — Amophila Krb. Latr. Ed. euc. — Pepsis Fbr. Spnl. — Miscus 

 Jur. — Sphex Auct. coet. 



, ,., . , , , , . J prsetiosa Eg. 5. 



Abdomine tnorace duplo lonqiore 1 . tut -i. t-h 



I sencea Ins. Mar. pacif. Fbr. 



** ^i 7 • I • 7- 7 argentata Hisp. — 



'^Abdomine longitudme thoracis i . n. .. 



arenaria Svec. — 



The first species included, prcetiosa Billberg, is a nomen nudum. 



The second species, Pepsis sericea Fabricius, is a variety of 

 Sphex (F. F. Kohl) aurulentus occurring in the West Indies so 

 probably was not before Billberg and should not be taken as the 

 type. 



The third species, Pepsis argentata Fabricius, is a common 

 European species; is a synonym of Sphex (F. F. Kohl) umbrous, 

 and may be chosen as the type of Ammobia. 



