4 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 61. 



minute shallow punctures; mesonotum finely reticulate and somewhat 

 shiny, becoming smoother and brighter towards the sides especially 

 of the scutellum; pleura and abdomen smooth and shining, with 

 delicately impressed reticulations on the basal tergite. Pubescence 

 throughout inconspicuous, but fine short hairs are present around 

 the oral margin and on the fronto vertex ; the eyes have very fine 

 short erect hairs ; the pubescence of the mesonotum and scutellum is 

 rather abundant and seriately arranged, becoming gradually a little 

 longer towards the apex of the scutellum, where there is a pair of 

 much longer suberect bristle-like hairs directed forward; abdomen 

 nearly bare, although a few short hairs are present besides the vibris- 

 sae and mainly located on the sides towards the apex. 



Coloration black and slightly metallic on the mesonotum and much 

 more strongly metallic bluish or green on the smoother and more 

 polished parts of the bod}^ 



KEY TO THE SPECIES CHRVSOPLATYCEEUS. 



1. Males 4 



Females 2 



2. Frontovertex narrow, the part included between the eyes somewhat over 



three times as long as wide ; scape about twice as long as wide ; smooth 

 polished area on each side of the mesoscutum nearly as wide as the sha- 

 greened median part ; axillae moderately elevated and with an oblique 

 declivity behind the weakly carinate middle; scutellum strongly depressed 

 above, being perfectly flat and highly polished in front of the fascicle ; row 

 of bristles bounding the proximal margin of the speculum of the fore 



wings comparatively thick, long, and prominent 3 



Frontovertex much wider, the part included between the eyes not over 2.5 

 times as long as its posterior width ; scape about a half longer again than 

 wide ; smooth polished area on each side of the mesoscutum small and 

 longitudinally furrowed, separated from the shagreened median part by a 

 carina ; this median part considerably depressed, about three times as wide 

 as the polished areas and extending laterad as far as the outer ends of 

 the axillae ; axillae strongly elevated, somewhat depressed anteriorly, then 

 abruptly angled and carinated with a nearly perpendicular posterior face ; 

 scutellum strongly convex from side to side and towards the reunded apex, 

 becoming somewhat tectiform towards the base, the disk being finely 

 shagreened in front of the fascicle of hairs ; row of bristles on the proximal 

 border of the speculum comparatively short and less prominent ; head and 

 thorax ferruginous, the abdomen black with an aeneous and greenish, 

 luster ___ferrisi, new species. 



3. General coloration somewhat metallic bluish and purple, the frontovertex 



nearly black; polished parts including face, occiput, sides of mesoscutum 

 and the scutellum brilliant metallic green ; narrow collar of the pronotum 

 dull orange ferruginous ; pleura somewhat ferruginous beneath a strong 

 metallic purple luster ; abdomen and dorsal surface of scape and pedicel 

 strongly purple ; legs except the ferruginous tarsi mostly blackish, with a 

 greenish luster on the upper surface of the middle and hind tibiae, the 

 middle femora somewhat ferruginous splendens (Howard). 



