336 PROCEEDINGS OF THE NATIONAL MUSEUM. yoL.xxn. 



6. Head not or less distinctly lenticular, smooth, shagreened or finely closely 



punctate, rarely with a few large punctures scattered over 

 the surface ; if with large, coarse, thimble-like punctures, 

 the antennie are inserted on the middle of the face. 

 Head always distinctly lenticular, the scrobes short, the punctures frequently 

 large, thimble-like; hind wings with the costal cell usually 

 extending to the hooklets. 

 Marginal vein at least twice as long as thick, usually much longer; luesono- 



t jm smooth, impunctate, or finely rugulose 10 



Marginal very short, or wanting, punctiform, not or scarcely longer than 

 thick; mesonotum punctate. 

 Mesouotum with the punctuation unlike that of the head, the punctures 



less dense and the surface coriaceous 8 



Mesonotum with the punctuation similar to that of the head 7 



7. Scape strongly dilated beneath or Avith a leaf-like expansion, the club much 



enlarged, as long or longer than the funicle. 



(38) JEnasius Walker. 

 Scape not dilated, normal, never with a leaf-like eximnsion, at most clavate. 

 Punctures on head and thorax coarse and dense. 



Mesonotum very short, only half the length of the scutellum; club of 



antenna; as long as all the funicle joints united; postmar- 



ginal vein as long as the stigmal. . (39) Chalcaspis Howard. 



Mesonotum at least as long as the scutellum; club of antennse shorter 



than the funicle; postmarginal vein much shorter than 



the stigmal (40) Bothriothorax Ratzeburg. 



Punctures on head and thorax smaller and less dense; mesonotum a little 

 longer than the scutellum; funicle joints longer than 

 thick (41) Aratus Howard. 



8. Vertex very narrow or not very broad, sparsely or very feebly punctate, ncv er 



closely i)uuctate 9 



Vertex broad, with a distinct thimble-like punctuation. 



Club of anteun;ie shorter than the funicle; postmarginal and stigmal veins 



short, subequal (42) Pentelicus Howard. 



Club of antennte very large, longer than the funicle and pedicel united; 



postmarginal and stigmal A^eins very long, the latter the 



shorter (43) Blepyrus Howard. 



9. Vertex not very narrow, very sparsely and feebly punctate ; eyes not especially 



large, nor nearly occupying the whole sides of the head; 

 scropes rather deep ; scape slightly dilated beneath toward 

 apex, the flagellum subclavate ringed with white, the 

 club scarcely thicker than the funicle; ocelli in an obtuse 

 triangle, the lateral farther apart than to middle or front 

 ocellus ; wings hyaline, subfuliginons toward base, the mar- 

 ginal vein punctiform, the stigmal longer than the short 

 postmarginal and marginal united. 



(44) Hemwnasius Ashmead, new genus. 

 Vertex and face very narrow, feebly punctate ; eyes A'ery large, occupying nearly 

 the whole sides of the head and almost meeting on vertex ; 

 front ocellus iilaced far in advance of the lateral ocelli, the 

 latter close upon the eye margin ; flagellum short, clavate, 

 the iiedicel large, obconio; first joint of funicle as well as 

 the following transverse; Avings with a large discal cloud 

 beneath stigmal and marginal A^eins, the postmarginal and 

 stigmal veins very long (45) Euryrhopalus Howard. 



