GIVIRA. By H. G. Dyar f- 
1277 
P. robiniae Peck (= crepera Harr., plagiatus Wkr.) (182 c). A most variable species as regards the 
markings. Forewing grey, reticulated black and irregularly spotted blackish. Hindwing of ochreous, basal 
area, costal margin and a narrow marginal line black, grey in the $. Distributed all over the United States. 
Larva in different trees. — reticulatus Lint. (= querciperda Pack.) has more diaphanous wings, especially in 
the distal third, less distinctly reticulated, without any dark spots. Hindwing monotonously smoky brown, 
scarcely reticulated. An aberrative $ form. quercus Ehrm. is likewise an aberrative $ form with yellow land- 
wings like the <$. — mixtus B. &• Benj. is a race with lighter forewings and hindwings, the with much reduced 
black on the hindwing. Colorado. — subnigrus B.& Benj. is darker, the hindwing of the $ with a faint yellow¬ 
ish tint. The south-western race from Arizona. — flavotinctus B. & Benj. is as light as mixtus , the black of 
the (J hindwing somewhat more increased, with a rounder interior angle, the $ hindwing of a distinct yellow 
tint, without attaining the aberration quercus. California. - zabolicus Stkr. is a $ form with more intensely 
blackened hindwings, from Florida. 
P. macmurtrei Guer. (= querciperda Fitch.) (182 c). $ very small with almost hyaline forewings, with 
black transverse striations, blackened at the inner margin in the basal two thirds like the hindwing, C much 
larger, likewise very scantily scaled, with fine and extensive transverse striations, a somewhat more coherent 
line from the exterior two thirds of the costal margin to the anal angle. Atlantic States to the west as far as 
Minnesota. 
17. Genus: Oivira Wkr. 
Anal veins of forewing united; 6 and 7 of hindwing arising from the same base or stalked; discal veins 
forked in both wings. Antennae of shortly bipectinated, of $ plain or serrate. One of the largest Cossid genera . 
Type: tristis Wkr. 
Section I. Hindwing with a cross-vein between 7 and 8 (Givira Wkr.). 
G. quadra Schs. ( gnoma Schs.) (182 d). Grey, brightened with whitish or reddish flesh-colour; a 
round dark punctiform spot at the cell-end and a larger spot basally above the interior margin below the median 
vein. Brazilian specimens are mixed with dull reddish flesh-colour, northern ones almost white in the middle, 
but the types of the two names are from Brazil; I avoid, however, using a new name. Brazil; Panama; Costa Rica. 
G. superquadra Dgn. (183 d) is somewhat larger than quadra , and more marked; the dark basal spot is 
incised on both sides by a reddish area which is connected by a light line; the discal spot is larger and more 
quadrangular, with dark shading behind it and below it. French Guiana. 
G. argenteolaminata Dgn. (183 d) is a still more variegated species of the quadra- type. Dark brown, 
the dark basal spot more divided into roundish spots and filled with a large quadrangular silvery spot; a dark 
shadow behind the large discal dot as far as the margin, which is strewn with blue scales and contains a series 
of larger brown spots. Only the type is known. French Guiana. 
G. binubila Dgn. (183e). The brown basal spot is divided into single badly defined speckles; the cell is 
striated brown, the area between veins 2 and 3 lighter and not marked. Hindwing brownish black. Only the 
type is badly preserved. French Guiana. 
G. aroa Schs. (182 d). Forewing covered with large, velvety dark brown spots which, however, do 
not contrast much with the lighter, less velvety ground; a larger submarginal spot is above veins 2 and 3, others 
however, are similarly conspicuous. Hindwing blackish brown. Mexico; Central America; Venezuela; French 
Guiana; Bolivia. 
G. juturna Schs. (182 d) is very similar to aroa, buth there is a dark spot in the light area below vein 2 
in the submedian area, so that the light area does not reach the cell, which is the case in aroa. Hindwing whitish, 
more or less speckled. Mexico; Costa Rica; Panama; Brazil. 
G. obidosa Dgn. (183 e). Here the spots are angular on a more lilac grey ground, with an oblique whitish 
subbasal line, another line from the costal margin bent on vein 3 to the distal margin, and an oval oblique discal 
ring. Hindwing whitish, feebly reticulated violettish grey. Only the type is known from the Amazons (Obidos). 
G. amanosa Schs. (183 e) generally resembles obidosa, but with reverse colours, the dark spots angular, 
the lighter interspaces rounded. Costa Rica. 
G. egipan Dgn. (183 e). Distal half of forewing light, large dark speckles on the light brown ground 
only along the costal margin, basally and at the interior edge of the fringe. Hindwing without markings. Only 
the type is known. A large species from Brazil. 
G. tigrata Schs. (183 e). Brownish yellow with a silver reflection, the markings richly red-brown; thorax 
robiniae. 
reticulatus 
quercus. 
mixtus. 
subnigrus. 
flavotinctus. 
zabolicus. 
macmurtrei. 
quadra. 
superquadra. 
argenteo¬ 
laminata. 
binubila. 
aroa. 
juturna. 
obidosa. 
amanosa. 
egipan. 
tigrata. 
