86 PROCEEDINGS OF THE NATIONAL MUSEUM. v..i..x-xiir. 



repeated here, the short clavate antennas being found in no other 

 tribe. 



The group is of small extent and is represented bj'- a single genus 

 not yet found outside of the European fauna. 



Antennae short clavate; metanotnni areolated (640) Hellufigia Graxenhorst. 



Tribe II. OPHIONINI. 



1868. Ophionoida-, Family 7, Forster, Verh. d. naturh. Ver. pr. Rheinl., XXV, ]ip. 



141 and 149. 

 18S7. Ophioiihia, Tribus, Thomson, Opus. Ent., XI, p. 1048. 

 1894. OpIiio)iini, Tribe VII, A.shmead, Proc. Ent. Soc. Wash., Ill, p. 277. 

 1900. OpMonini, Tribe II, Ashmead, Smith's Insects of New Jersey, p. 580. 



To this tribe belong the genuine Ophiones — insects belonging to 

 the genus Ophlon and allies — distinguished from all the others, except 

 those in the tribe IleUvngiini^ by having the second recurrent nerv- 

 ure uniting with the cubitus hefore the first transyerse cubitus. 



The true Ophionhu are. however, readily separated from the Jlell- 

 wlgilnl by their long, filiform, or setaceous antenna and by the flat 

 mesosternum. 



Twelve genera have been recognized, distinguishable as follows: 



TABLE OF GENERA. 



Front wingi? without an areolet. 



Face normal, unarmed 2 



Face armed with a tooth. 



Disco-cul)ital nervure not angularly broken; transverse median nervure in hind 

 wings angularly broken at the middle; abdomen petiolate. 



(641) Gravenhorstia Boie^ Odontopsis Forster. 



2. Disco-cubital nervure usually angularly broken v^ith a stump of a vein or a trace 



of such a vein 3 



Disco-cubital nervure vot angularly broken, straight or bent, aithout a trace of a 

 stump of a vein 4 



3. Second abdominal segment with the spiracles placed at the middle; metanotum 



not c-ompletely areolated, usually with one or two transverse carinse; 

 claws i)ectinate. 



Lai )ium abnormally lengthened 12 



Labium normal, not lengthened. 



Transverse median nervure in front wings interstitial, or nearly, with 

 the basal nervure, in the hind wings obtusely angularly broken at 

 or near the middle; first abcissa of radius normal, not swollen at 



base (642) Oplilon Gravenhorst. 



Transverse median nervure in front wings not interstitial with the basal 



nervure, originating a little before it, in hind wings broken below 



the middle at the basal third, or at least far below the middle; first 



abcissa of radius thickened ov swollen towards the base. ( Hawaii. ) 



(643) Pleuroneurophion Ashmead, new genus. 



(Type, PleuronenropJiton hawaiensis Ashmead, manuscript. ) 



4. Transverse cubital nervure straight, in a pointed angle with the cubitus, the 



latter originating from the apex of the disco-cubital cell. 



Claws pectinate 5 



Claws siniple, not pectinate 11 



II 



