50 DIPTERA OP NORTH AMERICA. [PART IV. 



2. Tibiae with spurs at the tip. 



a. Subcostal cross-vein posterior to the origin of the second 



longitudinal vein. 



a. Normal number of the antennal joints sixteen. 



Section IV. LIMNOPHILINA. 



Gen. XXVII. Epiphragma. Gen. XXIX. Ulomorpha. 



Gen. XXVIII. Limmophila. Gen. XXX. Tricliocera. 



Genera : Gynoplistia Westw. (Australia, America), Cloniophora 



Schin. (Australia), Cerozodia Westw. (Australia), Ctedonia 

 Phil. (Chile), ? Bolymoria Phil. (Chile). 



8. Normal number of antennal joints from six to ten. 



Section V. ANISOMERINA. 



Gen. XXXI. Aiaisomera. Gen. XXXIII. Eri©cera. 



Gen. XXXII. Cladolipes. Gen. XXXIV. Pesatlaoptera. 



Genera: Evarvioptera Guer. (S. America), Ptevocosmns Walk. 

 (Asia), Oligomera Dolesch. (Java), Physecrania Bigot 

 (Madagascar). N. B. — All these genera are closely allied to Erio- 

 cera, some of them probably synonymous with it. 



b. Subcostal cross-vein anterior to the origin of the second 



longitudinal vein. 



Section VI. AMALOPINA. 



Gen. XXXV. Amalopis. Gen.XXXVIII. Dicranota. 

 Gen. XXXVI. Pedicia. Gen. XXXIX. Plectromyia. 



Gen. XXXVII. Ula. Gen. XL. RhaphidolaMs. 



Genus ? JPolymera. 



II. TIPULID^E INCERTJE SEDIS. 



Section VII. CYLINDROTOMINA. 



Gen. XLI. Cylindrotoma. Gen.XLIII. Plaalacrocera. 

 Gen. XLII. Triogina. 



Section VIII. PTYCHOPTERINA. 



Gen.XLIV. Ptychoptera. Gen. XLVI. Protoplasa* 



Gen. XLV. Bittacomorpha. 



Genus Tanyderus Phil. (Chile). 



III. TIPULID^ X.ONGIPALPI. 



