P. ESBEN-PETERSEN, NEUROPTERA AND MECOPTERA. 15 



Distoleon differs from Formicaleon only with regard to 

 the greater length of spurs. It seems to me that this differ- 

 ence is only of subgeneric value. Banks places Myrmeleon 

 histrigatus Ramb. in Distoleon, but this is not correct. 2 A 

 is present in the hindwing of histrigatus and nigrosignatus 

 Till.; it is short and runs almost along with the hind margin; 

 between lA and 2 A one crossvein, whereby an almost cir- 

 cular and rather conspicuous cell is formed, in likeness to 

 what takes place in the Acanthaclisini. 



I erect the foUowing genus to include the above named 

 species, and I consider M. histrigatus Ramb. as geno-type. 



Eidoleon n. g. 



Wings long and slender, pointed at apex. Hindwing as 

 long as forewing. Costal area of forewing a little narrowed 

 at base, for the rest so far out as to the pterostigma of same 

 breadth. Apical area with one regular series of crossveins. 

 Rs arises a little further out than fork of Cu^. Anterior 

 Banksian line present. The angle between Citia and Cu\^ 

 acute. Posterior Banksian line distinct, forming a continuous 

 line of the recurrent nervure, arising from the end of Cwip. 

 The free basal part of Cu^ rather short; only one crossvein 

 from Gu^ to this part of Cu^. 2 A and 3 A coalesce for a 

 distance. 2 A unforked; 3 A forked. The costal area in the 

 hindwing of the same shape as in the forewing. The apical 

 area with one regular series of crossveins. Rs arises close to 

 the base of the wing. No Banksian line in the hindwing. 

 Between M23, and the hind margin 3 rows of cells basally, 

 2 rows apically. lA present. 2 A present; it is short and 

 runs along with the hind margin; a crossvein present between 

 1 A and 2 A. This crossvein is often like a branch from 1 A. 

 Basal joint of tarsus short, twice as long as second joint; 

 second, third and fourth joint very short; fifth joint as long 

 as the four other joints united. Spurs as long as the first, 

 second, third and fourth joint united. 



Eidoleon histrigatus Rambur, Hist. nat. Ins. Névropt., 

 p. 391, 1842. — Queensland: 1 specimen, Colosseum; 2 speci- 

 mens, Christmas creek. N. W. Australia: 2 specimens, Kim- 

 berley district. 



It is a wide-spread species. 



