1913.] NATURAL SCIENCES OF PHILADELPHIA. 235 



seem impossible that the Anormostigmatini may have descended 

 from some form like Thaumatoneura. 



Professor Foerster considers Thaumatoneura as a connecting form 

 between the Calopteryginse and the legion Podagrion. ''which is 

 better left with the Calopteryginse." "Bei .... Thamnato- 

 neura ist der aussere Ast des Sector inferior trianguli convex nach 

 vorn gebogen wie bei alien echten Calopterygiden. Bei alien 

 Agrioninen ist er dagegen schwach convex nach hint en. "^^ Many 

 Calopteryginse (Selys) have not Cu2 convex anteriorly, of course, 

 such as Micromerus, Rhinocypha biforata and other species, Libellago, 

 etc., but perhaps these are not ''echt." On the other hand, such 

 Agrionines as Megaloprepus, Microstigma , and Paraphlehia also have 

 Cu2 convex anteriorly, while a tendency in the same direction is 

 observable in Argiolestes and even in Hyponeura, so that I cannot 

 see that any strong argument for the Calopterygine affinities of 

 Thaumatoneura can be drawn from this character. 



Comparison of Philogenia (terraba, carrillica) with 

 Phenacolestes. 



{Ph. terraba cf , Ph. carrillica cf 9 , Costa Rica.) 



These two genera agree in the characters above numbered 4, 5, 6, 

 7, 10,-0 11 {carrillica, not terraba), 12,2o 14, 16, 18. 



These two genera differ in characters given below; after each 

 number the difference shown by Philogenia is stated. 



1. Nodus at one-fourth of the wing-length. 



2. Only two antenodals. 



3. Postnodals 22-30. 



8. Between Mia and M2 is at first but one row of cells which, more 



distad, is increased to two and then to three rows by the 

 presence of two distinct curvilinear {i.e., not broken) supple- 

 mentary sectors, the posterior of which arises proximad to the 

 anterior; each of these three rows increases to a double row 

 before reaching the wing-margin at an individually variable 

 distance therefrom. 



9. M2 separating from Mi at one-third of the distance from nodus 



to stigma. 

 11. Rs separating from M1+2 a little distad to the subnodus {terraba, 



not carrillica). 

 13. Arculus slightly distal to the second antenodal. 



19 Jahrh. Nassau. Ver. f. Naturk. in Wiesbaden, 62, p. 214, 1909. 



-" At the very margin itself, each of the three rows in Philogenia tends to divide 

 into two rows, but each of these last extends inward only 2-3 cells from the 

 margin. 



