31 



EUMENIDAE. 



Macrocalymma gen. no v. 



Ligula long, slender, deeply cleft at apex, the paraglosaae with 

 horny pilose tips. Labial palpi 3-jointed, two basal joints elongate 

 and subeqnal, the third short, about half as long as the second. Maxil- 

 lary palpi short, four-jointed, the first thickest and longer than the 

 second, which in some aspects is subclavate, the third very slender 

 and much longer than the small apical joint. Middle tibiae with two 

 spurs, the claws of tarsi bifid at apex. Wings with the second cubital 

 cell much contracted above and receiving ooth recurrent nervures. 

 First abdominal segment pedicellate, very slender on the basal half 

 (or less), behind this subquadraie in oorsal aspect, this subquadrate 

 apical part rounded in front, and slightly concave hehirid, the posterior 

 lateral angles prominent; second segment with a very short neck or 

 basal constriction, which is smooth and shining. To these characters 

 it may be added that the mandibles are short, their apical margin 

 oblique and quadridentate, the clypeus widely subtruncate or very 

 faintly emarginate at apex, not at all pointed. The tegulae are greatly 

 developed, their apices reaching back slightly behind the posterior 

 margin of the scutellum; the propodeum has trenchant lateral sub- 

 membranous carinae, which posteriorly form a projecting angle (but 

 rounded off) on each side. 



This genus may be known at once from any of those with two 

 spurs on the middle tibiae, cleft-tarsal claws and similar neuration, 

 by the distinctive characters of the mouth-parts. 



Macrocalymma smithianum sp. nov. 



Head black, the clypeus, a spot between the antennae, one behind 

 the eyes and a line on the scape in front, yellow. Antennae with the 

 first two joints, som-etimes also some of the following, the modified 

 apical ones, and the flagellum beneath, ferruginous or reddish. Pro- 

 notum obscure red, with a yellow line in front, the tegulae reddish 

 with pale margin and apex; a spot on each side of tht post-scutellum 

 and the lateral submembranous carinae of the propodeum pallid and 

 yellow; a spot beneath the tegulae red or yellow. Legs ferruginous, 

 the hind femora and sometimes the base of the intermediate ones more 

 or less, the coxae and sometimes the middle and posterior tarsi black 

 or blackish; sometimes the posterior tarsi only are fuscous. Abdomen 

 black, more or less densely covered with golden tomentum; first seg- 

 ment with the apical dilated part dull red, more or less distinctly yel- 

 low-margined posteriorly; second segment with a yellow or reddish 

 yellow apical band; third with a reddish oa.ad, and this and the follow- 

 ing segments with pallid apical margins. 



Head with the vertex subquadrate, seen in profile sharply angulat- 

 ed posteriorly behind the eyes, antennae terminating in a hook. Head 

 and thorax closely and coarsely (more or less rugosely) punctured, 

 the propodeum coriaceous and with much finer and less distinct punct- 

 ures. Wings conspicuously clouded along the costal margin, else- 

 where smoky or yellowish-tinged and hyaline, the stigma dark brown, 

 its apical margin obliquely truncate Basal abdominal segment closely 

 punctured; second much more finely and sparsely, the surface shining 



