4 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



3. Vertex rounded, postvertical bristles absent or microscopic. 



Celyphus Dalinann. 



Vertex sharply cariuate above and slightly raised behind ocelli ; postvertical 



bristles usually represented by microscopic hairs Spaniocelyphus Hendel. 



4. Scutellum much longer than thorax, and without bristles ; mesonotum without 



central bristles and the margin with but two, which are confined to the 



postsutural section Acelyphus, new genus. 



Scutellum not longer than thorax, with two bristles on disk near base and 

 two on margin near apex ; mesonotum with several pairs of dorsocentral 

 and one pair of acrostichal bristles in front of scutellum, the humeral 

 and notopleural bristles also present Idiocelyphus, new genus. 



ACELYPHUS, new genus 



Generic characters. — Most closely related to SpanioceVyphus, dis- 

 tinguished from it by the presence of a well-developed pair of post- 

 vertical bristles, the lack of a cross vein separating the discal and 

 posterior basal cells of wing, and the much broader abdomen, which 

 has the tergites evenly rounded over sides and without a slight suture 

 about at the part where they curve over. In Spaniocelyplius there is 

 a rather evident suture on each side of each tergite which divide it 

 into three almost equal portions. 



Genotype. — AcelypJms politv^, new species. 



There are but three species known to me, which may be distin- 

 guished as below. 



KEY TO THE SPECIES 



1. Entire disk of scutellum and mesonotum with dense erect miscroscopic pile ; 



length of scutellum not over 1.5 as long as its greatest width ; hypopygium 



as Figures 5 and 6 stigmaticus (Hendel). 



Scutellum without dense erect microscopic pile, Its length distinctly over 1.5 

 as long as its greatest width 2. 



2. Scutellum smooth except for the widely separated piliferous depressions ; 



hypopygium as in Figures 9 and 10 ; mesonotum without microscopic erect 



pile except on extreme anterior margin politus, new species. 



Scutellum with regular close stipplelike punctures in addition to* the pilif- 

 erous depressions ; mesonotum with dense erect microscopic pile on entire 

 surface repletus, new species. 



ACELYPHUS POUTUS. new species 



Mah and female. — Prevailing color tawny yellow, deeply over- 

 laid with metallic violet-bliie. Legs tawny yellow. Apices of palpi 

 deep black. 



Frons about 1.5 as wide as long, the vertex not very sharply 

 carinate, almost rounded except just behind the ocelli and near 

 each eye, the two pairs of verticals and the po^t verticals well de- 

 veloped; flattened part of the arista fully twice as long as the 

 apical hairlike parts; palpi much dilated at apices, spoon shaped. 

 Scutellum without pronounced punctures, with almost imperceptible 



