MORGAN HEBARD 131 



ner)*"; a series of males of both of these species before us shows 

 without exception the distal portion of the caudal femora blackish 

 brown, while those of vitrea also have the cephalic limbs and 

 caudal surface of the head ver}^ dark brown. In other respects 

 males of vitrea agree closely with the type of iriodes, except that 

 the tegmina and wings are distinctly more elongate in the former 

 species. The colored tegmina and wings in males of cordillerae 

 are distinctive.^^ 



Type. — cf ; Santa Marta, INIagdalena, Colombia. December 

 26, 1910. [Hebard Collection, Type No. 460.] 



Size rather small for genus, form moderately slender. Head with occiput 

 distinctly raised above eyes. Ocelli prominent. Pronotum moderately elon- 

 gate, margins cingulate, smooth; collar slightly longer than wide; shaft strongly 

 constricted mesad, caudad of the decided supra-coxal enlargement, transverse 

 sulcus distinct, with shallow weak sulci adjacent on collar, which broaden and 

 diverge cephalad. Tegmina and wings fully developed, extending distinctly 

 beyond apex of abdomen, but less elongate than in fraterna and cordillerae. 

 Supra-anal plate strongly transverse, length about one-fourth basal width, 

 free margin convex latero-distad, transverse mesad, showing very feel)ly a 

 sub-bilobate condition. Cerci about twice as long as supra-anal plate, tapering 

 to acute apex, joints feebly defined. Subgenital plate with free margin convex, 

 showing a brief but sudden distal emargination, the portions laterad of this 

 not bluntly acute-angulate produced as in fraterna and cordillerae. Limbs and 

 their armament as characteristic for genus, their proportions as in fraterna 

 and cordillerae. Features of coloration are important as specific diagnostic 

 characters. 



Length of body, 19.5; pronotum, 5.2; tegmen, 15.2; wing, 13.7; cephalic 

 femur, 5.3; caudal femur, 4.8. Width of head, 3.7; pronotum at widest point, 

 2.2; tegmen, 4.2 mm. 



Head oil green; eyes dresden brown, heavily suffused with oil green dorsad; 

 antennae oil green briefly proximad, the remaining portions black; ocelli clay 



^^ We here select the type locality for iritrea as Costa Rica. This insect may 

 represent a geographic race of cordillerae, or merely the recessive extreme of 

 coloration found in that species. Sufficient material to determine this defin- 

 itely is not at present available. 



^^ From Costa Rican material of ^4. fraterna (Saussure and Zehntner) at 

 hand, we find that females of that species agree closely with those of cordillerae 

 and vitrea except in l)eing distinctly more slender; males of that species, how- 

 ever, in addition to this feature, are very strikingly and differently colored. 



Through the kindness of Professor L. Bruner we have also been al)le to 

 examine both sexes of A. nndticolor (Saussure), from Trinidad. Females of 

 that species would suggest small and remarkably l)rilliant individuals of cor- 

 dillerae of intensive coloration. The males, however, show that the species is 

 much more nearly related to certain South American forms (A. eximia and 

 allies). 



TRANS. AM. ENT. SOC, XLV. 



