TRIACA^•'nlAG^■^"A and Gvxaca.xtiia 17 



from Guatemala, specimens from as widely separated localities as Mexico 

 and Ecuador showing the same character. The larger number of specimens 

 have three cells in the most anterior row of cells ot the anal loop, but speci- 

 mens with two cells are numerous, and asymmetrical specimens are not rare. 

 With few exceptions there is a single row of cells throughout between Mg 

 and Rs but in a few cases there is a single double cell. In the males there are 

 usually two cells just posterior to A between the anal loop and the anal 

 triangle, rarely one; and in the female there are four cells between the anal 

 loop and the wing base. In the male the sternum of abdominal segment i may 

 be smooth or may have as many as twelve small black spines and the spines 

 on the ventral posterior margins of 2 vary from a single row of six or seven 

 spines on each side to a small patch of as many as sixteen spines. In con- 

 trast with these variable characters, there are three denticles on each 

 auricle, one of these concealed on the inside of the auricle and anterior to the 

 other two. 



The wide variation in many characters, the great variation in size, and the 

 wide distribution of the material before me, led me to expect to fmd two or 

 more confused species, but I have been unable to recognize more than one 

 species. At the same time I have been unable to identify the species ob- 

 scuripcnnis. It is rather remarkable that scptima is represented in the large de 

 Selys collection by a single male. As recorded by Martin ohscuripennis is 

 represented in the same collection by two males and two females. The 

 appendages of obscid-ipcnnis as figured by Martin seem relatively shorter and 

 heavier than those of scptima, but characters for separating the two species 

 are not very definite. Much of the material before me has been studied by 

 Dr. Calvert and I follow him in referring it all to scptima but it seems to me 

 not improbable that that name is really a synonym of ohscuripennis. The 

 abdominal appendages of the female of septima are elliptical with a low 

 median longitudinal dorsal carina and the extreme apex acute. 



My notes contain the following references to living colors : Males, 

 Bolivar, Colombia : Eyes dark greenish brown above, gray beneath ; thorax 

 largely bright light green with few light brown markings, dorsum with a 

 semicircular area covering the lower part ; abdomen light brown, markings 

 green and black. Female, Santa Marta, Colombia : Thorax above rich 

 light brown, with a wide curved stripe on the mesepisternum green, wider 

 and yellowish below, sides largely green; abdomen clove brown, markings 

 obscure yellowish and black. Several well preserved males are colored as 

 follows : On dorsum of thorax a lower central triangular or semicircular 

 area, and an antehumeral stripe, which, tends to fade out in the surrounding 

 green, pale brown ; sides of thorax and abdominal segments i and 2 and base 

 of 3 to or beyond the transverse carina, largely green. Dorsum and sides 

 of abdomen brown, green as follows: i, D spot; 2, AD narrow, MD large, 

 joined with A^IL, PDs separated in the midline above, and on side PD and 

 PL not joined; 3, AL, ML, MD, PD and PL present, the two latter not 

 joined ; on 4 and progressively posteriorly the spots are smaller and more 

 obscure, MD, the best marked, disappearing after 8; extreme base of 2-8 

 dark ringed. 



