1909.] 213 



longer tlian the bodj. Tliorax coriaceously |miictate ami black, with the prosternum 

 pale stranuiieous ; mesoiiotuiii tuniidous vviili no iiotauli, its apex rounded and sub- 

 produced above the prothoras ; metanotnm somewhat short and convex, strongly 

 rugose, with no distinct arese, but with trnceable lateral carinae and large spiracles. 

 Scutellum not convex, dull and reticulate, with simple basal fovese. Abdomen 

 black and subnitidulous, finely sculptured and becoming paler basally beneath, of $ 

 strongly deplanate towards the apex, and of $ subcompressed tiiroughout , basal 

 segment not twice longer than apically broad, finely coriaceous and longitudinally 

 aciculate, laterally strongly constricted behind the very prominent central spiracles, 

 whence it is contracted to its base ; second, third and (in <?) fourth segments sub- 

 quadrate and hardly shorter than the first ; remaining segments short and pilose ; 

 terebra s'out, black, and shorter than half the basal segment ; valvulse exserted. 

 Legs not elongate, entirely stramineous or (in ? ) with the coxae nigrescent and the 

 hind tibise and tarsi infuscate ; calcaria stout and of equal length ; cJ with inter- 

 mediate tarsi, somewhat stout, and all the joints of the hind ones distinctly incras- 

 1.^ — ^Bjpi ^ljm^^^ sate, subspatuliform. Wings 



/ " ' 'T"^^ r"^^"'*'''''^'!^ evenly and distinctly ,though 



I _J„— X — --......, not deeply, infumate with 



\ 1F~~ — __ the nervui es piceous and not 



\ ^_^,^^ J \,_ ■ ~ very definite ; costa broad 



X^,^-'"'''^ '"■"'^ ^ — 'f-!!\. and emarginate above the 



^•"■^ — -^^ " ' large and infuscate stigma ; 



metacarpus very short, and so broad as to form a pseudostigma ; tegulse piceous, 

 radix hyaline ; hind-wings somewhat broad with no distinct transverse nervures. 



Length, <? $ , 3 mm. 



The subsessile abdomen is very distinct from that of all known 

 Euphori, except Haliday's unsatisfactory E. mitts {ef. Entom., 1908, p. 

 287), from which it materially differs in the mesonotal sculpture and 

 notauli, number of flagellar joints, pedal coloration, and petiolar 

 structure. The peculiar conformation of the hind tarsi forms a very 

 distinct link with Pacliylomma, which I think may novv, upon a con- 

 sideration of the above two species, be most naturally placed between 

 the Areolarii and EupJiorince. 



This species was discovered by Mr. H. St. John Donisthorpe, 

 who writes {in lift. 9th, 12th, iv.09), " I caught two females in 

 July, 1906, and saw several others hovering over a nest of Eormica 

 rufa at Weybridge and striking at the ants (Ent. Rec, 1907, p. 5) ; 

 and I bred the male out of my F. rufa observation nest from Wey- 

 bridge, April 13th, 1907 (Ent. Rec, 1907, p. 255). Wasmann says 

 he is sure it is a new species, and tells me he has taken it at Luxem- 

 burg with E. rufa and E. pratensisy Mr. Donisthorpe has subse- 

 quently taken this species at Weybridge, July 5th, and at Bewdley, 

 July 20th, of the present year; and Mr. A. H. Hamm took two ?a 



