No.iJOG. ICHNEUMON FLIES— ASHMEAD. 101 



Tribe XII. PLECTISCINI. 



1868. Plcdiscoidx, Family 22, Foksteu, Verb. d. naturh. Ver. pr. Rheinl.,XXV, 



pp. K 3 and 170. 

 1871. Plectiscoidx Forster, Verb. d. naturh. Ver. pr. Rbeinl., XXVII, p. 71. 

 1888. Plectisdna, Tribus, Thomson, Opus. Ent., XII, p. 1170. 

 1894. Fledisdni, Tribe XI, Ashmead, Proc. Ent. Soc. Wasli., Ill, p. 277. 

 1897. Pleciisdni, Tribe, Davis, Trans. Am. Ent. Soc, XXIV, p. 240. 

 1900. Pleciisdni, Tribe XII, Ashmead, Smith's Insects of New Jersey, p. 585. 



This tribe, as at present defined, is scarcely a natural minor group, 

 since it comprises several discordant genera, with affinities allying 

 them to genera in the Cryptince, the Tryplioninm, and the Pimplince. 

 Davis, without stating his reasons for so doing, placed the group with 

 the Tryphomnw. This is clearly an unnatural position for the 

 majority of the genera, the only genus which could be removed to 

 that group being Pamtnicra Forster, and I have tabulated that with 

 the tribe TryplwninL To me this tribe, as at present defined, comes 

 nearest to the Porizonini^ and is here placed at the end of the Ophionid 

 series as less liable to create a disturbing element in the present 

 arrangement of the subfamilies and tribes than if placed elsewhere. 



Thirt3^-one genera are placed in this tribe, separable as follows: 



TABLE OF GENERA. 



La) )rnm not or scarcely exserted 4 



Labrum more or less widely exserted. 



Metanotum without areas 2 



INIetanotum uith areas, or at least always with an areola 3 



2. Front wings i«7/ioi«< an areolet (782) Adelognathus Holmgren. 



Front wings trnth an areolet ( 783) Synxma Forster. 



3. Labrum at apex deeply emarginate; areolet in front wings absent; abdominal seg- 



ments two and three, quite smooth ( 784) Notoineris Forster. 



Laljrum at apex not emarginate; areolet in front wings present; abdominal seg- 

 ments two and three, not smooth (785) Cnemischys Forster. 



4. Ovipositor most frequently prominent, not hook-like, curved at apex 5 



Ovipositor not prominent, but hook-like, curved at apex. 



Front wings vAthout an areolet ( 786), Grypocentrus Kuthe. 



Front wings with an areolet (787) Campothreptus Forster. 



5. Front wings ^^)ith an areolet 6 



Front wings uithout an areolet 12 



6. Head with the vertex not especially broad, the cheeks not l)uccate; ai-eolet not 



transverse 7 



Head with the vertex bi'oad, the cheeks l)uccate; areolet transverse, broadly 

 sessile ( 788 ) Macrochasmus Thomson. 



7. Face not narrowed toward the mouth 8 



Face narrowed toward the mouth. 



Clypeus convex, separated from the face by a faint furrow. 



(789) Catastenus Forster. 

 Clypeus almost flat or very feebly convex ( 790) Symplecis Forster. 



8. Metanotum areolated 9 



Metanotum not areolated ( 791 ) Aperileptus Forster. 



