16 Journal New York Entomological Society. [Voi. xviii. 



from which the Proctotrypidse have evolved, and thus well removed 

 from the Bethylidae. 



There is still another group which forms a discordant element 

 in the Bethylidae, the tribe Sclerogibbini, widely distributed but rep- 

 resented so far as known by only a few rare genera. Of one of 

 these, Mystrocnemis Kiefifer, I have had the opportunity to study a 

 species from Cape Colony recently described (Brues, '06). The 

 group is characterized by extraordinary multiarticulate antennae, 

 greatly thickened legs, and in some genera by a very peculiarly formed 

 head. The antennae must undoubtedly be secondarily modified, for 

 no other family except the Trigonalidae resembling these insects in 

 any way possesses antennae of this sort, and the same must apply to 

 the head. I suspect that the genus Algoa (Fig. 4) here described 

 is related to this group, and as it furthermore shows strong Tiphiid 

 and Cosilid affinities, I believe that Mystrocnemis and its allies are 

 derivatives of the group from which the recent Tiphiidae and Cosilidse 

 have come. The confirmation of this must, however, await further 

 discoveries. 



From the foregoing, it appears that the old family Bethylidse must 

 be regarded as a very unnatural assemblage, and in the appended 

 table I have attempted to suggest a more acceptable arrangement of 

 its components. 



Bethylid^ (including the Bethylini of Ashmead, derived from 

 Ampulicid-like forms). 

 Bethylince. 

 Prist oc evince. 



Dryinid.e (including Dryiniis and its allies, derived from Ampu- 

 licid-like forms). 



Embolemid^ (an ancient group related to the forms from which 

 the Proctotrypidae are descended). 



PSclerogibbid.e (a group related to the Tiphiidae and Cosilidae). 



Part. III. Description of New Genera and Species. 



DRYINOPSIS, new genus. 



Female. — Wingless. Thorax trilobed, the pro-, meso- and metathoracic 

 segments being sharply separated. Head large, twice as wide as the thorax, 

 much narrowed behind the eyes, and about twice as wide as thick ; posteriorly 

 sharply margined. Vertex convex, front concave above the antennae, and below 



