ERIOCERA. 251 



It seems that Eriocerse, with Jive posterior cells are more 

 abundant in Asia, whereas those with four prevail in South 

 America. The three Asiatic species, described in Wiedemann : 

 basilaris, acrostacta, and mesopyrrha, and Macquart's bicolor 

 (if the two latter are Eriocerse) have five posterior cells ; Fhyse- 

 crania Bigot, from Africa, likewise. Nevertheless, Limnobia 

 diana Macq., from Bengal, Caloptera nepalensis Westw., 1 from 

 Nepaul, and Limnobia sumatrensis Macq., from Sumatra, have 

 four posterior cells. The numerous Eriocerse from South Ame- 

 rica which I have seen in the Berlin Museum, as well as the 

 above-quoted South American species, described by Wiedemann, 

 Macquart, and Guerin, all have four posterior cells. That this 

 law should be general, I doubt very much, but it is remarkable 

 enough that it should be so prevalent, and that among a con- 

 siderable number of South American species there should not be 

 a single one with five posterior cells, while in North America, 

 among four species which are known, one has that number of 

 cells. 



Another, not less remarkable circumstance is, that among this 

 large number of specimens, described in works or seen by me in 

 collections, I did not find a single one provided with very long 

 antennae in the male sex, such as distinguish three North Ame- 

 rican species of Eriocera and one Fenthoptera. Many species, 

 it must be admitted, were represented by females only ; the an- 

 tennae of several others were broken ; but among the twenty-four 

 species of the Berlin Museum, eleven were represented by males 

 with well-preserved antennas, and all these antennae were short. 



Among the Diptera included in amber, which I have had an 

 opportunity to examine in Mr. Loew's collection, there is the 

 genus Allarithmia, with a single species, A. palpata (Loew, 

 Bernstein u. Bernsteinfauna, 1850, p. 38), which is a female 

 Eriocera with four posterior cells, ten-jointed antennae, and an 

 elongated last joint of the palpi. There were, moreover, two 

 species of Eriocera represented by males with long antennas. 

 One of them has been mentioned in the above-quoted paper of 



1 Westwood's Caloptera nepalensis has only four posterior cells, if this 

 author is right in quoting Gnerin's figure of the South American Evaniop- 

 tera. Pterocosmus Walker, with several Asiatic species, has also four cells, 

 if I decipher right the description of the wing in List, etc I, p. 78 ; but I 

 may easily have been mistaken in my interpretation.. 



