224 NEUROPTERA. 
from Frontera, three have no yellowish-brown at the tips, while the other eleven show a gradual transition 
from only the merest trace at the extreme apices to a condition where the brown extends inward 
(proximad) to the level of the last postcubital. The extent of this apical colouring is not dependent on 
age, for it reaches its greatest extent, in the Frontera series, in a female showing no pruinosity and whose 
colours generally are bright and fresh, while no yellowish-brown at the wing-tips is seen in individuals 
with little, and with much, pruinosity. Among females from other localities having the wings not tipped 
with brown, some are young, others are old and partly pruinose. 
No males from any locality show more than the merest trace of apical wing-colouring, nor do any of the 
present females from the West Indies. 
Both extremes of size given on p. 221 are found in the examples from Vera Cruz. 
Hab. Lower Carirornia, San José del Cabo? (Hisen, coll. P. P. C.: 1 3 ).—MeExico, 
Tepic [1 ¢], Santiago Iscuintla [1 ¢], Guadalajara [1 ¢, 1 2] (Schumann) [1 ¢ | 
and El Castillo [1 3 ] (McClendon, coll. P. P. C.) in Jalisco, Altamira in Tamaulipas 
(Hoag, coll. P. P.C.: 13,49), Atoyac (Schumann, H. H. Smith: 66,4 2) and 
Coatzacoalcos (coll. Deam: 1 2?) in Vera Cruz (coll. Adams: 5 3,6 2), Frontera 
(coll. Westcott: 4.6, 14 92) and Teapa (H. H. Smith: 4 38, 5 2) in Tabasco, 
Lumija * in Chiapas (coll. Westcott: 1 3, 3 @), Salina Cruz (coll. Deam: I ¢ ) and 
Tehuantepec (Sumichrast, M. C. Z.: 13, 22) in Oaxaca, Campeche!; Britisy 
Honpuras, Belize (Blancaneaur: 1 3); Guatemata, Panima [1 ¢,1 2], Chacoj 
[1 3 ] (Champion); Honpuras, San Pedro Sula (Williamson, coll. ejusd.: 1 3 ).— 
CotomsBia, Santa Fé de Bogota [Lindig: 1 3]; Gutana, Surinam [Thorey: 1 3] 
(M. C. Z.); Ecuapor, Duran [1 ¢ }, Guayaquil [1 2 | (Ff. Campos f., A. N.S,); West 
Inpizs, Havana (Baker, coll. P.P.C.: 1 2) in Cuba!’ 8 (Poey, Wright, M. C.Z.: 2 ¢, 
1 2), Isle of Pines®, Jamaica*, Samana (Frazar, M.C.Z.: 486,119; coll. P. P.C. 
ex coll. McLachlan: 1 3,1 2) in Hayti (Abbot, A. NW. S.: 1 o,1 2)f. 
Taken in most of the months of the year at various Mexican localities, e. g., January 
to April at Teapa. 
* Lumija “is the name of a finca or rubber plantation some two hundred miles up the Grijalva River from 
the Bay of Campeche.”—Dr. O. 8. Westcott, in litt., May 14, 1905. 
+ Dr. Ris® extends the distribution of this species to Southern Brazil and Argentina, and gives some 
differences shown by the examples from the extreme southern limit from those of Equatorial and Central 
America. I have before me four males, one female from Rio Janeiro (M. C. Z.), Sapucay in Paraguay 
(U.S. N. M.), and near Coroico, Yungas, Bolivia (A. NV. S.), of rather small size (abdomen, ¢ 21-24°5, 
Q 22; hind wing, d 23-27, 2 26 mm.), which differ from all the specimens enumerated above in having 
the brown stripes on the first and second lateral thoracic sutures so widened that their adjacent edges coalesce 
almost completely, thus forming one wide brown stripe enclosing a green vitta inferiorly ; in having the 
external hamular branch extending forward only to the level of (and not anterior to) the front edge of 
the anterior lamina; two pointed tubercles (wanting in didyma) on the ventral surface of abdominal 
segment 1 of the male; superior appendages more slender, not tending to form a tooth at the last inferior 
denticle. These individuals seem worthy of a varietal name, and, if they have not yet received one (a question 
almost impossible to determine from the published descriptions), may be known as Micrathyria didyma 
hypodidyma, subsp.n. Dr. Ris has since informed me (in litt., 6. xii. 05) that he finds the bulk—but not 
the type—of Micrathyria septima, Selys, in the Selysian collection to be this southern form of didyma. The 
type of M. septima is the same as M. wqualis, Hagen, as noted under that species, vide posted. 
