86 Mr. K. M'Lachlan on Calopterygina 



Wings hyaline, but having a slight reddish appearance 

 in consequence of the reticulation being loholhj bright red, 

 excepting the entire marginal nervure, which is black. 

 Pterostigraa very small, slightly longer than broad (f mm. 

 long), brown, between two blackish nervules in very 

 mature individuals, slightly dilated on its lower edge. 

 32 — 34 antecubital nervules in the anterior wings. 



Bright metallic green above and on the sides ; labrum 

 somewhat chalybeous, with a large yellow spot on either 

 side, clothed Avith black hairs. Basal two joints of an- 

 tennas yellow. Sides of thorax with four narrow yellow 

 lines, which become almost entirely filled in with black in 

 very mature examples. Under side of thorax varied with 

 black and yellow, the black predominating in very mature 

 examples. Legs deep black, the coxas spotted and en- 

 circled with yellow. Abdomen bronzy-green above to 

 near the end of the fourth segment, then passing into 

 black with a violet tinge ; sides of first and second seg- 

 ments yellow (but becoming blackish with scarcely a trace 

 of yellow in very mature examples). 



Length of abdomen ( ? ), 48 — 50 mm. Length of pos- 

 terior wing, 41 — 43 mm. ; breadth, 9 — 10 mm. Expanse 

 of wings, 87-^90 mm. 



Hab. — Intaj, Ecuador. 



Four ?, all tolerably mature, but one more so than the 

 others. 



This magnificent species is the largest of the genus, 

 exceeding L. globifera, and with broader wings. It is 

 peculiar in structure, especially in having a true ptero- 

 stigma in the posterior wings (whereas in other species it 

 is altogether wanting), and there is a thickened nervule 

 and slight constriction of the median nervure at the point 

 where it should occur in the anterior wings. At first I 

 hesitated as to the place of this species (being acquainted 

 with the 2 only), and was strongly inclined either to locate 

 it in IletcErina, or to form a new generic (or sub-generic) 

 division for it. I believe, however, that it is really a Lais 

 (and in this opinion am strengthened by that of Baron 

 De Selys, to whom I communicated an example), but 

 forming a special section, for no Lais hitherto known has 

 any trace of a pterostigma in either pair of wings. 



En th re fas c ia ta, Selys. 



Two mature $ from Ecuador agree with a type from 

 Venezuela excepting in unimportant particulars. The 



