— 30'i — 



PronoUim yellowish laleially, Menosolum liglitgrey witli a very n.iiTow, 

 capillary, l)rovvn stripe ibal is somelimes oblileraled : latéral margins of 

 praescutum broadiy and conspicuonsly iiglit yellow ; lubercnlate pils and 

 pseudosulural foveae dark, aboiit on a level; scutal lobes dark p;i'ey, ibe 

 médian area ligbter giey; scntcllum giey anten'orly. niargined posteriorly 

 witb obscure yellow; poslnotnm broadiy grey medially, yellowish lalerally. 

 Pleura yellow, variegated A\ith groy. Mesoslernum dark grey. Haltères 

 yellow. Legs wiih ibe coxae yellow, Ibe bases infnmed : Irocbanlers yellow •, 

 femora brownisb yellow, (lie lips broadiy infuscated ; libiae an metalarsi 

 obscure yellow, tipped wilh brown ; reniainder of tai'si dark brown. Wiiigs 

 yellowish subhyaline, Ihe cord and outer end of cell ist I/o faintly seamed 

 with darker; a brown spot at end of /?i ; veins brown. Venation : 

 iS^i ending jusl before /•; Sc-2 far from iip of .Sri, approximately ojjposilc 

 origin of Hs, in some cases a Utile beyond , in others a little before this 

 origin ; Bs long, slraight ; r 09 /?2 less llian its own length beyond the fork 

 of /?2 + 3 ; ^2+3 and r-/« subeqnal ; cell ist il/2 usually open by the atrophy 

 of ibe outer deflection of 1/;? : m punctiform ; basai delleclion of (Àii befoi-e 

 ihe fork of M, this distance grealer than nne-half its length; vein fîml A 

 straighl, the two anal veins being slrongly divergent. In some cases the 

 crossvein is alrophied so the distal section of IA3 lies Iree in the membrane. 



Abdomen dark brown, the caudal margin of the segments broadiy 

 obscure yellow; genitalia in both sexes reddish yellow. Maie hypopygium 

 with two pleural appendages, the largest Iriangular in outline, the bioad 

 base ol' this triangle forming the distal margin , blackcned and provided 

 Avith a few selae; outer pleural appendage pale, flattened liiangular, about 

 as long as the inner aj)pendage. At the base of each pleurile on inner 

 face a blackened lobe whose ouler margin and apex are covered wilh 

 abundanl denticles. (îonapophyses appeaiing as four slender pale horns, 

 tlie two longest being divergent apically. What seems lo be the ninlli 

 tergite appear as two (laltened black lobes thatare conspicuonsly separated 

 on the médian line, the caudal and proximal margins of each lobe wilh a 

 séries of microscopic, appressed tceth. 



Habitat. — Mongolia ((iobi). 



Ilolotype, d*, Cha-Tchéou , marais de Pa-hou-lian, May 1909 (Dr L. 

 Vaillant). 



Allolopotype, 9. 



Paratopolypes, 9.0 d9. 



Type in the collection of the Paris Muséum. 



The i-eference of this species lo Acyphnna is provisional. The insect, 

 to}}<'tli(;r K. [A.) urooJitUi Siebke of Northern Kuro]»' .ind ollier species, 

 does nof seem to be consubgeneric wilh Une Aci/plidiKi. 



