BY JOHN WALTON. 15 



no doubt whatever they are female and male ; consequently 

 the latter name must fall. No. 36, A. Spartii, 3Q mas. and 

 fern. I have several times compared this insect with A. 

 Rumicis. I cannot discover any important variation either 

 in the habit or sculpture ; I believe them to be the same 

 insect. I invite Entomologists to examine them; it is an 

 insect which I have never taken in the north, therefore I 

 do not feel myself justified in expunging one of the names ; 

 though I have no doubt in my own mind, that A. Rumicis will 

 fall, when passed through the ordeal of a rigorous examination 

 with A. Spartii. The sexes are correctly given in both species, 

 and will, therefore, not interfere with our opinions as to a 

 separation. 



No. 39, A. unicolor. 39 mas. and/^m. This species seems to 

 have been first described from a single specimen, in the collection 

 of Mr. Spence ; since which two specimens, male and female, 

 have been added to Mr. Kirby's collection, and the specific 

 description has been amended in the second part of his mo- 

 nograph. The geminated elevation between the antennae is 

 not an uniform character. I have examined, from time to time, 

 upwards of one hundred specimens ; sometimes it is absent, 

 and sometimes present, in both sexes. I have females 

 with, and without, this geminated elevation, — the sexes I cap- 

 tured in copula, at Scarboro', as before mentioned. No. 41, 

 A. aterrimus. As the label, with the number, is not attached to 

 the pin containing the insect, but on a separate pin above it, it 

 may not apply to this small insect, which seems to be A. velox 

 (long. I — 1 lin.) ; it cannot be intended to represent A. ater- 

 rimus, described by Mr. Kirby, because it is so much larger, 

 (long. Corp. H lin.) I think a different insect must have 

 been attached to this number, — perhaps an A. Radiolus. Mr. 

 Stephens has omitted A. aterrimus altogether, as a species un- 

 known in this country. 



No. 45, A Gyllenhalii. Major Gyllenhal sent Mr. Kirby 

 this species ; it is represented by a single insect, pinned, la- 

 belled, and numbered 45 ; it happens, unfortunately, to be a 

 female of ^. tinicolor. I have deposited a dozen specimens of 

 both sexes, for the inspection of Entomologists, in the cabinet 

 of the Entomological Society, amongst which will be found 

 examples, with piceous and black antennae. Other dark 

 species of this genus, particularly A. Senictdus, vary in the 



