132 Mr. F. Walker on some new species of Chalcidites. 



segments short : legs dull red ; feet pale red, their tips brown : wings 

 ample, tinged with tawny colour ; veins tawny ; ulna hardly half the 

 length of the humerus; radius longer than the ulna; cubitus much 

 shorter than the ulna; stigma small, brown. Length of the body 

 1£ line ; of the wings 2^ lines. 



"Found on the edge of the pond in the Zoological Gardens, 

 Phoenix Park, Dublin (in September), where Notiphila cinerea and 

 Ephydra littoralis (or coarctatd) were abundant. Perhaps a parasite 

 of the latter, as Ur. maritimus is of Ephydra riparia." Haliday MSS. 



In the collection of Mr. Haliday. 



Panstenon Pidius, mas. Cyaneo-viridis, abdominis disco purpureo- 

 cupreo, antennis fulvis , pedibus flavis , alis perangustis. 



Body bluish green, very long and narrow : head and chest scaly : 

 head much broader than the chest ; front impressed : feelers tawny, 

 slender, filiform, inserted in the front, nearly half the length of the 

 body ; first joint long and rather stout ; second stout and cup-shaped ; 

 third and fourth hardly visible ; fifth and following joints small, 

 nearly equal in size; eleventh, twelfth and thirteenth forming a 

 spindle-shaped club about twice the length of the tenth joint : chest 

 spindle-shaped : fore-chest short : scutum of the middle-chest rather 

 long ; sutures of the parapsides not distinct ; scutellum obconical, of 

 moderate size : hind-chest large, subquadrate, hardly declining : 

 petiole yellow, nearly one- sixth of the length of the abdomen, which 

 is spindle- shaped and somewhat shorter than the chest; disc pur- 

 plish copper ; segments of moderate size, slightly decreasing towards 

 the tip : legs pale yellow, long and slender ; middle-feet and hind- 

 feet pale straw-colour ; tips of the feet tawny : wings extremely nar- 

 row, with a slight yellow tinge, more or less shorter than the body ; 

 veins yellow ; ulna much shorter than the humerus ; radius shorter 

 than the ulna ; cubitus of moderate length ; stigma small. Length 

 of the body J line ; of the wings j-1 line. 



Distinguished from P. Oxylus by its much narrower wings and by 

 other characters. 



Ireland. In Mr. Haliday's collection. 



Panstenon Oxylus, reared by Mr. Haliday from the pupa of a Di- 

 pterous insect {Agromyza Pisi, Kaltenbach) on the pea. 



Prosopon montanum. — Female. Head and chest brassy green, 

 covered with fine scales : feelers black, clavate, twelve-jointed, about 

 one-third of the length of the body ; first joint long, rather slender, 

 tawny beneath and at the base ; second cup- shaped ; third very short ; 

 fourth and following joints short, closely joined together, successively 

 but slightly decreasing in length ; tenth, eleventh and twelfth joints 

 forming an elliptical club which is broader than the ninth joint and 

 more than thrice its length : abdomen smooth, purple varied with 

 green and copper colour on the sides and at the tip, somewhat ellip- 

 tical, nearly flat above, slightly keeled beneath, a little broader and 

 longer than the chest ; first segment short, convex along the hind- 

 border ; second rather longer, also convex on the hind-border ; third 



