DESCRIPTIONS OF CERTAIN SPECIES OF WASPS OF THE 

 FAiMILY SPHECID^. 



By Henry T. Fernald, 



Of the Massachusetts Agricultural College, Amherst, Massachusetts. 



The following descriptions and notes have accumulated since the 

 publication of my paper on tliis group, in the Proceedings of the 

 United States National Museum, in 1906. Nearly all that has been 

 added to our knowledge of the group since that time has come as the 

 result of additions to the collections of the United States National 

 Museum. 



CHLORION MANDIBULARIS (Cresson). 



This species was described from a single female specimen taken in 

 Cuba by Gundlach, and the redescription given by me* was prepared 

 from the type. 



Another specimen collected in Santo Domingo and now in the United 

 States National Museum enables me to determine more definitely 

 which characters given in the above paper are individual and wliich 

 are of specific importance. 



The characters in which this specimen differs from the type are as 

 follows : 



Pubescence everywhere silvery. Clypeus with a shght, bilobed 

 median projection on its anterior margin. Greatest width of cheeks 

 behind the eyes at about the middle of the head. Scape of antenna 

 very faintly ferruginous below. Lateral pubescent bands of meso- 

 notum meeting posteriorly; anterior median groove not pubescent; 

 post-scutellar pubescence only at the sides, not in the middle ; dorsum 

 of median segment thicldy clothed with wliite hairs and with a trace 

 of pubescence on each side above the petiole. Abdomen about 

 equally pointed in outUne at each end ; the first dorsal plate sericeous ; 

 the second, third, and fourth glistening and with a bluish reflection. 

 Hairs on the last two abdominal plates above, brownish; terminal 

 plate rather more acuminate than "rounded acuminate." Wings 



1 Proc. U. S. Nat. Mus., vol. 31, 1906, p. 410. 



Proceedings U. S. National Museum, Vol. 42— No. 1902. 

 20441°— Proc.N.M.vol.42— 12 17 257 



