264 PROCEEDINGS OF THE ACADEMY OF [1895. 



SYNOPSIS OF THE STIZINI OF BOREAL AMERICA. 

 BY WILLIAM J. FOX. 



In working over the fossorial wasps belonging to the genera in- 

 cluded in Handlirsch's monograph 1 it seemed to me that, inasmuch 

 as the latter's work is probably inaccessible to most American 

 entomologists, the publication of synoptical tables of those genera 

 elsewhere, together with such notes as may be available, and the 

 description of new species should there be any, would be of service 

 to those interested in the subject. It is my hope to work gradu- 

 ally over the genera monographed by the above author, and to 

 prepare from time to time synoptical tables for publication. 

 Therefore, this paper may be considered the first of a series, which 

 I trust will be concluded in the near future. 



The two genera composing the Stizini maybe separated as follows: 



Marginal cell about twice as long as the first submarginal ; spurs of 

 hind tibise enlarged in £ au d the pygidium well developed ; 

 abdomen ( $ ) with a single spine at apex. Sphecius. 



Marginal cell much shorter than the first submarginal ; spurs of 



hind tibipe short in both sexes, not enlarged ; no well-developed 



pygidium, at theimost with a short ridge on each side of the 



last dorsal abdominal segment ; abdomen {$ ) with three spines 



at apex. Stizus. 



SPHECIUS Dhlb. 



Sphex Drurv (in pt.) Ins. II, PI. 38, fig. 1. p. 71, 1773. 

 Stizus Latreille, Tab. Encycl. et Method, pi. 382, fig. 6, 1809. 

 Sphecius Dahlbohin, Hym. Eur., p. 154, 1845. 

 Hogardia Lepeletier de St. Fargeau. Hym. Ill, p. 288, 1845. 



Stizus, various authors. For full synonymy see Handlirsch, Sitzb. Akad. 

 Wissensch. Wien. XCVIII, Bd., Abth. 1, p. 441. 



FEMALES. 



Abdomen with segments 1-3 only of abdomen spotted with yellow. 



Black, legs rufous ; punctuation of second dorsal abdominal seg- 

 ment rather close speciosus. 



Entirely rufous, excepting of course the abdominal and face mark- 

 ings; punctuation of second dorsal abdominal segment very 

 sparse convallis. 



1 Sitzungsberichte der K. Akademie der Wissensehaften. Mathematisch- 

 naturwissenschaftliche (lasse. XXXV — LI. 



