20 WORKS ON NORTH AMERICAN ENTOMOLOGY. 
Buaxr, C. A.—Monograph of the Mutillide of North America. 
<Trans. Amer. Ent. Soc., xm, pp. 179-286, 1886. 
This monograph supersedes the synopsis by the same author. 
Fox, W. J.—The North American Mutillide. <Trans. Amer. Ent. 
Soc., xxv, pp. 219-292, 1898. 
Metanper, A. L.—Notes on North American Mutillide, with de- 
scriptions of new species. <Trans. Amer. Ent. Soc., xxix, pp. 
291-330, pl. 1, 1908. 
Anprk, E.—Fam. Mutillide. <Gen. Ins., Fasc. 11, pp. 77, pls. 3, 
1908. 
Virreck, H. L.—The species of Odontophotopsis. <Trans. Amer. 
Ent. Soc., xxx, pp. 81-92, 1904. 
SAPYGIDLE. 
Cresson, E, T.—|Synoptic table of the North American species of 
Sapyga.| <Trans. Amer. Ent. Soc., vii, pp. xx—xxi, 1880. 
SCOLIIDE. 
pp Saussure, H., and Sicuer, J.—Catalogus specierum generis Scolia. 
Geneva, pp. 352, pls. 2, 1864. 
POMPILID.E. 
Cresson, E. T.—Notes on the Pompilide of North America, with de- 
scriptions of new species. <Trans. Amer. Ent. Soc., 1, pp. 85- 
150, 1867. 
Fox, W. J.—The species of Pepsis inhabiting America, north of— 
Mexico. <Proc. Ent. Soc. Wash., 1v, pp. 140-148, 1897. 
The North American species of Ceropales. <Trans. Amer. 
Ent. Soc., xix, pp. 49-63, 1892. 
SPHEGID-E. 
Parron, W. H.—Some characters useful in the study of Sphecide. 
<Proc. Boston Soc. Nat. Hist., xx, pp. 378-385, 1880. 
Critical notes on genera and species. 
Kout, F. F.—Die Hymenopterengruppe der Spheginen. <<Ann. k. 
k. Naturh. Hofmuseums, Wien, v, pp. 77-194, 317-462, 1890. 
Frrnatp, H. T.—Notes on the North American species of Isodontia 
Patton, with descriptions of a new species and variety. <Can. 
Ent., 19038, pp. 209-271. 
