44 Rev. F. D. Morice on male terminal segments and 



I am rather unwilling to separate this from halteatus, 

 with which it agrees in almost every particular. But the 

 difference in the seventh ventral plate is remarkable. 

 (Prof. Perez has seen my dissections and agrees with me as 

 to this.) The lobes are differently shaped, and their petioles 

 are absolutely impunctate and unciHated. To this I may 

 add, that in the one specimen whose external characters I 

 have examined for this paper — two others I seem to have 

 unfortunately mislaid, and can at present only find the 

 dissections — there are thirteen hooks in each wing (a number 

 which also occurs in all my specimens of j^crczi), whereas in 

 halteatus I have never found more than eleven. But I 

 fear this character is not reliable, for my solitary specimen 

 of the next species {cecrops) has thirteen hooks in one 

 wing and eleven in the other ! 



Whether eous is a true species, I must leave to be 

 decided by those who can tell me what " a true species " 

 really is. But I have found the pilosity of the concealed 

 segments so constant a character in all the genera in 

 which I have examined it, that for the present I must 

 regard it as specific. The absence of the characteristic 

 hairs in my specimens of eous is not due to accidental 

 depilation, for the punctures from which they should 

 originate are wanting also. 



My one remaining entire specimen of eous ^ is from 

 Helenensdorf, Transcaucasia, sent me by Herr Koul of 

 Vienna. It is not in such a condition that I can say 

 whether in fresh specimens it might be distinguished 

 from halteatus by external pilosity-characters. In structure, 

 except as to the alar hooks and the naked " petioles " of 

 the seventh ventral plate, I have failed to find any difference 

 between them that I can regard as clearly specific, and 

 unfortunately I do not know eous $. 



3. Cecrops, n. sp. PI. VI, 3, 3a, 3&. 



Balteato simillimus, cum quo facile confundi potest, sed genia 

 multo longioribus (ptene quadiutis !), etianique segmenti ventralis 

 septiini petiolis bases versus liaud ciliatis, ut opinor, certe discedeus. 



This insect again comes exceedingly near to halteatus, 

 but its gense are evidently longer, so that in my Table it 

 is placed among the species with sub-quadrate genae. They 

 are also irregularly rugose, or rugosely punctured, longitu- 

 dinally almost all over, while in halteatus there is a wide 



