94 Mr. F. W. Edwards 07i the Old- World 



from the mesosome. Apart from this the species resemble 

 one another in build, coloration, yellow scape of the antenuse, 

 small size of frontal tubercle, short, more or less convex 

 axillary vein, rather short Sc, short Rg, and position of r-m 

 cross-vein. The apparently fundamental difference in the 

 number of posterior cells (3 or 4) is bridged in an interesting 

 way. A re-examination of the three specimens of A. lutei- 

 pennis in the British Museum shows that one of them has 

 three posterior cells (as figured by me in 1912) ; one lias very 

 distinctly four posterior cells and a closed discal cell ; while 

 the third has a short disconnected piece of vein M3 present. 

 I therefore consider the removal of E. luteipennis and 

 E. ferrug'mea from Hexatoma to be entirely justified. The 

 Seychelles group is a very distinct one when Old- World forms 

 alone are considered, but the South-American Feidhoptera 

 sandcB-marthce, Alex., shows certain resemblances, 



3. The crystalloptera Group. — The four Ceylon species 

 with crystalline wings described by Osten-Sacken form 

 another distinct group, with a number of characters in 

 common, as indicated in the key. Three of these are repre- 

 sented in the British Museum, but only one of them 

 (E. crysfalloptera) in the male sex. The hypopygium of 

 this s[)ecies, like that of Hexatoma, has bilobed parameres 

 (text-fig. 2 k), the upper lobe being bent about the middle, 

 and a small arrowhead-like })enis, but the outer clasper has 

 the subapical notch well-marked. 



4. E. lunata., Westw. — This is another isolated species with 

 a striking venational peculiarity in the extremely broad 

 upper basal cell (a point which is not sufficiently brought 

 out by Westwood's figure) and with a very distinctive type 

 of wing-marking. The white tip to the veins Rj and Ilo, also r, 

 may indicate a connection with E. ornata ; if that is so, the 

 straight tip of Cui could be regarded as linking E. ornata 

 with the verticalis group. Additional characters common to 

 E. ornata and E. lunata, and found only in these two species, 

 are the unusual breadth of the upper l)asal cell and the 

 parallelism of the basal part of Rs with Rj ; neither of these 

 points is at all indicated in E. verticalis. The hypopygium 

 of Westwood's type (the only example known) is unfortu- 

 nately now damaged, but Westwood figures a very peculiar 

 structure of the claspers, and the parameres (unless broken 

 off) are not elongate as in E. ornata. 



5. E. pusilla, Alex. — In the very short, strongly upturned 

 tip of Ri, as well as in the structure of the hypopygium and 

 ovipositor, this species shows a greater resemblance to Hexa- 

 toma than to Er'iocera, and should in my opinion be placed 

 there. It is particularly interesting as connecting Hexatoma 



