106 PROCEEDINGS OF THE NATIONAL MlSEl'M. vol.xxiii. 



15. Radius originating hrfore the middle of tlie t^tigma. 



Recurrent nervure received Ijy the first eubital cell. . (832) Acrobcld Fijrster. 

 Recurrent nervure received by the second cubital cell. 



(838) OrlhoMujmd Ratzeburg. 

 Radius originating at or a little l)eyond the middle of the stigma. 



(834) Mesocriiia Forster. 



16. Marginal cell closed Jirfore the tip of the wing 17 



Marginal cell closed at the tip of the wing 19 



17. Recurrent nervure received by the second cubital cell IS 



Recurrent interstitial or received by the first cubital cell. 



Recurrent nervure received by the firat cubital cell; subdiscoidal nervure 

 originating far heloto the middle of the disccndal nervure; mesontjtal 

 furrows entirely wanting (835 ) IlomopJiyla Forster. 



Recurrent nervure distinctly interslitial ; subdiscoidal nervure interstitial or 

 nearly; mesonotal furrows distinct (836) Mesolhesis Forster. 



18. Anal cell in hind wings not extending beyond the middle of the median cell. 



(837) Mlsophthom Forster. 

 Anal cell in hind wings extending beyond the middle of the median cell. 



(838) Adelura Forster. 



19. Second discoidal cell completely closed. 



Submedian cell closed just behind the basal nervure; radial cell in hind 

 wings normal, not divided by a transverse nervure 20 



Submedian cell closed far behind the l)asal nervure; radial cell in hind 

 wings divided into two by a transverse nervure. . (839) Idlolexis Forster. 



20. First abscissa of radius forming with the second nearly a straight line; meso- 



notal furrows absent; subdiscoidal nervure originating from below the 



middle of the discoidal nervure (840) Aclisis Forster. 



First abscissa of radius forming with the second a strong angle; mesonotal fur- 

 rows distinct, uniting at about half the length of the mesonotum or a 

 little beyond, and thence as a deep sulcus toward the scutellum, the 

 middle lobe usually with a median grooved line; subdiscoidal nervure 

 interstitial or nearly (841) Phienocarpa Forster. 



Tribe II. ALLCEINI. 



This tribe is composed of ull winolrss and sulnipterous Ah'siids, and 



winged foims having a linear or lanceolate stigma, the hind wings |j 



being inlthout a recurrent nervure. ■' 



Twentj^-two genera have been recognized, distinguishable as follows: ii 



TABLE OF GENERA. li 



Fully winged - 3 i\ 



Wingless or with al)breviated wings 2 .'j 



2. Wingless. ' j 



Head large; viewed from above, bilol)ed; second joint of flagellum nuich j 



longer than the first (842) Ohasmodon Haliday. < 



Subapterous or with abbreviated wings. 



Wings wi7//0H< a distinct venation; head subglol)ose; first joint of fiagellum 

 longer than the second (843) Pimerema Forster. 



Wings wlili a distinct venation, the submedian cell confluent with the second 

 discoidal; head, transverse; male (844) Alhva Haliday. 



3. First cubital and first discoidal cells separated 5 



First cubital and first discoidal cells confluent, the first abscissa of the cubitus 



absent 4 



