r .549 ) 



connectiug veinlet betweeu the siibcostul system and the upper radial vein is 

 generally called the npper discocellular vein ; the veinlets connecting the first 

 radial with the second and the second with the third respectively arc named middle 

 and lower discocellulars ; while, very inconsistently, the vein connecting the lower 

 radial with the npper median 

 nervtile is considered an npper 

 section of the median nervnre. 

 However, if the transverse vein 

 between the snbcostal system 

 and the first radial, which has 

 developed from the subcostal 

 system, is termed upper or first 

 discocellular veinlet, the con- 

 necting veinlet between the third 

 radial and the median system 

 should consequently be called 

 fourth discocellular. 



The upper submedian vein 

 is in butterflies not developed, 

 but the jjlace where it stands in 

 otlier Lepidoptera is indicated 

 by a fold in the wing ; the ex- 

 treme basal portion of the sub- 

 median nervule is developed in 

 Chara.res and allies, forming the 

 so-called " spur " of the median 

 nervure. In the descriptions the 

 same designations for the veins 

 will be used as in the accom- 

 panying diagram (Fig. 1) : — 



PC = 

 C = 



Sf = 



II = 



M = 



SM = 



Praccostalis; 



t'ostalis; 



Snbcostalis, with five 

 branches, SC'to SC';,: 



Radialis, with three 

 branches, R' to W\ 



Mediana, with two 

 branches, M'and M-': 



Submediana, with two 

 resp. three branches, 

 (SM') to S5F,* the 

 brackets of (SM') 

 indicating that the 



h.sn'' 





p' 



Fig. 



• It is ijcibaps necessary to iioiiit out ihat I count the branches from the costal towards the internal 

 side, not in the reverse direction. In the Ucvi.sion of the Eastern Papihos I h.ive adopted the usual nomen- 

 (dature of the neuration. and counted three median branches on the forewing, designatinir them a.s first, 

 second, and third branch, the first being the mcjst costal of the three. Herr F. Kiiber reproaches nii: with 

 having said that in rapiUo hluimi g there is a hairy streak on the second and third median branch, while, 

 according to Eiibcr, it should be the first ami second. Well, the fact is that Ri'.ber's fii-st and second are 

 my second and third. RiJber counting the branches from the internal side, and I from the costal side (see 

 But, Nachr. XXIII. p. 223 [I8U7]). 



