ANISOMBBINI. 529 



Section ANISOMElilNI. 



The chief distiuguishing characteristic of this Section lies in the 

 nntennte which are abnormal in the number of joints, containing 

 generally six in the male, and generally ten (not more) in the 

 female.* In the male the antennae are sometimes no longer 

 than in the female; in other species, otherwise closely allied, the 

 antennae in the male attain a length twice that of the Ijody, whilst 

 in tlie female they are no longer than usual. This fact indicates 

 that differences in the relative lengths of the antennae in the sexes 

 have only a specific, and not a generic, value. This variability is 

 present in at least three genera, including the two principal ones, 

 Anisomera (which is not Oriental) and Eriocera. f 



Two submarginal cells are normally present, rarely one only 

 (Claduli'pes, a non-Oi'iental genus) ; normally there are four or five 

 posterior cells, sometimes three only ; J discal cell closed or open ; 

 subcostal cross-vein near tlie tip of the auxiliary vein, beyond the 

 origin of the 2nd longitudinal vein. 



Tibiae with spurs at the tip; empodia distinct; ungues genei*ally 

 smooth. 



Genitahaof male consisting of a pair of elongated, subcylindrical 

 basal pieces, each bearing two appendages, one of which is claw- 

 shaped and horny, the other being coriaceous and blunt. Ovipositor 

 in Anisomera rather peculiarly constructed, the valves being short 

 and blunt, the upper ones consideiably shorter than the lower 

 ones ; in the other genera the ovipositor normally constructed. § 



This Section is rather closely allied to the Limnophiliivi, the 

 resemblance between the venation in E^'locera and LimnopJiila 

 being considerable. In the male genital organs there is also much 

 resemblance between the two genera. 



* Tbe exact number of joints in the female antenna is not easy to determine 

 in dried specimens, but Osten Sacken counted ten joints on living female 

 specimens of Anisomera and Penthoptera. 



t Eriocera in addition to being represented by about fifty Oriental species, 

 appears to be extensively distributed throughout the tropical regions of the 

 globe, nearly thirty species being recorded from the equatorial regions of 

 the New World, besides numerous others from tropical latitudes in other 

 countries. 



I There are three only in the two non-Oriental genera Anisomera and 

 Cladulipes. 



§ Occasional exceptions are known, as Osten Sacken speaks of a North- 

 American species of Eriocera with an ovipositor constructed like that of 

 Aimoonera. 



