78 WILLIAM J. VOX. 



SLPPIiE.^IEXT TO "THE CRABKOXIX.E OF 

 BOREAL, AilIERIC A." 



BY WILLIAM J. FOX. 



The present contribution is necessitated by the occurrence of sev- 

 eral errors, chiefly typographical, in my monograph of the Crab- 

 roninre. The opportunity has also been seized to add a few notes on 

 several species which were unknown to me until quite recently, the 

 types of Avhich were kindly loaned by Mr. Samuel Henshaw, of the 

 Museum of Comparative Zoology at Cambridge. One new species 

 is added to our fauna, bringing the number of known North Amer- 

 ican species of Cnihro up to 104. 



Crabro parviiliis Pack. 



]Mrs. Slosson has sent me a female specimen of this species taken 

 at Franconia, N. H., which is the most easterly locality recorded for 

 it. In thi» specimen the pronotum and metanotum are spotted. 



Crabro pauper Pack. 



In the synoptic table, p. 220, the name pauper was inadvertently 

 written dentieulaUis. The latter species is synonymous with obncurus. 



Crabro nigrifroiis = septentrionalis Pack. 



As suggested in my paper, septentrionalis is synonymous with 

 nirjrifrons. I have examined the type and can see uo diflerence from 

 nigrifrons. 

 Crabro sigiiifor Pacjs. 



This species is very close to advenus, the 9 differing by the tips 

 of femora being yellow, and the space between the eyes at their 

 nearest i)()int of convergence is distinctly less. Space between hind 

 ocelli slightly less than that between them and nearest eye-nuirgin. 

 Wings not dusky on aj)ical portion. Posterior face of middle seg- 

 ment without transverse ridges, shining, the lateral ridges well de- 

 veloped ; no distinct transverse ridge se])arating the upper and pos- 

 terior faces. Otherwise the 9 > the type of which has been kindly 

 loaned me by Mr. Samuel Henshaw, is as in advenus. The S is 

 still unknown to me. 



