92 Mr. R. M'Laclilan on Calo-pterygina 



between the first and second sectors of the triangle ; the 

 second of the triangle longly and regularly trifurcate. 



2. Wings hyaline, universally tinged with yellowish, 

 ■which is more pronounced, and somewhat greenish on the 

 anterior margin. 



Nasus, labrum and cheeks piceous (yelloAvish or brownish 

 in somewhat immature examples). Basal two joints of 

 antenna yellowish. Top of the head black with a large 

 fulvous spot on either side anteriorly, connected Avith a 

 similar one on either side of the vesicle ; posterior margin 

 with a continuous fulvous line dilated at either end. 

 Prothorax varied with fulvous and black. Thorax brownish 

 (golden-brown in immatvu'e examples), with black lines, 

 none of which are very distinct excepting that placed on 

 either side of the black dorsal carina. Legs black ; femora 

 brown internally, almost up to the tips. Abdomen bronzy- 

 black with chalybeous and violet reflections ; first and 

 second segments almost entirely yellowish, the second 

 black in the middle above ; third to sixth with a yellow 

 ring at the anterior end, sometimes almost interrupted 

 above by a prolongation of the black ground ; a yellow 

 lateral line on the third and fourth segments in the mature 

 insect, extending to the fifth in immature examples ; an 

 indication of a yellow s])ot on either side of the eighth 

 and ninth segments. 



Length of abdomen, 34 — 37 mm. Length of posterior 

 wing, 32 — 34^ mm. Expanse of Avings, 70 — 73 mm. 



Hah. — Intaj, Ecuador, 3 $. 



Apparently allied to C. dualis, but smaller, and with 

 the colours somewhat different ; the Avings more strongly 

 tinged, the neuration less complicated, the nodus nearer 

 to the origin of the pterostigma (hence the number of 

 antecubital and postcubital nervides is nearly equal). 

 Through C. dualis it forms a good example of the gradual 

 transition from Thore to Cora. 



Cora terminalis, n. sp. 



Nodus placed midAvay between the base of the Aving 

 and the origin of the pterostigma, which is dai'k broAvn 

 (paler in the $ ), thick, 3 mm. long, its inner edge very 

 oblique, surmounting 5 cellules ; 34 — 37 antecubital and 

 29 — 33 postcubital nervules, in the anterior Avings. Two 

 sectors interposed betAveen the first and second sectors of 



