ERYTHEMIS. 337 
3. The youngest examples have the face and lips dull luteous, thorax and abdomen luteous with a tinge of 
red, no dark markings on the thorax, those of the abdomen very faint, the basal spot of the hind wings 
deep yellow. After the dark antehumeral stripes have appeared, the frons is pale green superiorly and 
has a transverse anterior brownish band, clypeus obscure, some black on the free margin of the labrum 
and a median black band on the labium. Black subsequently covers the lips, but the pale green on the 
frons remains longer, while pruinosity is developing on the ventral surface of the abdomen. Later, 
the entire frons becomes blackish with some metallic-violet reflection. The pale colours on the. abdomen 
are retained longer than those on the thorax. 
@. This sex passes through similar, if not as complete, colour-changes. The material from Duran indicates 
that the beginnings of the dark antehumeral stripes are present as lines (about ‘2 mm. wide) before any 
dark markings appear on the lips, although a faint indication of the anterior frontal dark stripe can be 
seen. Pruinosity is sometimes present on the ventral abdominal surface when no black is visible on the 
lips, but this is not invariably the case. Black overspreads the lips, as in the males, but I have seen no 
female which has lost the pale colour of the superior surface of the frons, even when the pale abdominal 
markings have almost vanished. 
Such variations as I have been able to detect in comparing examples from widely separated localities are the 
following :— 
8. Brazil & 
Altamira Gualan Duran Paraguay 
Abdomen, od .......-.. (in mm.) 34 30°5-35 33-37 31-33 
” QD sececeveee ” 30°5-34:5 29°5-84 31-36 29-34°5 
Hind wing, d_ ........ » 34-35 32-35 31-5-35 33 
on Qe ee eee ” 34-35°5 32-35 31°5-35 31°5-36'5 
Most frequent number of ante- 3 12 
cubitals, front wing.......... } 13 18 g 13 18 
Most frequent number of ante- } 3 10 10 9 9 
cubitals, hind wing.......... i 29,10 | 
Maximum excess of abdomen- | gl 32 
length over hind-wing-length 0 0 
° 20 g1 
in mm..... be cecece erences 
Maximum excess of pneowins | 
rength over abdomen-length in S35 S ; Sis S55 
The last two series of figures indicate that at Gualan and at Duran the abdomen and hind wing vary in length 
to such an extent that one or the other may be the longer. 
Hab. Uniren States, Esperanza Ranch near Brownsville, Texas (Schaeffer, Brooklyn. 
Inst.: 1 2 ).—MeExtco (coll. Adams: 2 & ), Mazatlan (Crotch *), Tepic? (Hisen & Vaslit, 
coll. Calif. Acad. Sci.?: 1 ), Jalisco (Schumann: 13 ), Altamira in Tamaulipas (Hoag, 
coll. P. P.C.: 46,7 2%), Atoyac (H. H. Smith, Schumann: 6 3, 2 2), San Lorenzo 
Cordova (Zrujillo: 1), Orizaba [1 2 ], and Tlacotalpam [2 ? ] (Barrett, colls. P. P. C., 
McLachlan) in Vera Cruz, Rio Papagaio [1 2] and Dos Arroyos [1 2] in Guerrero, 
Frontera [1 6] (A. H. Smith) (coll. Westcott: 13,7 2) and Teapa (H. H. Smith: 
2g) in Tabasco, Lumija in Chiapas (coll. Westcott: 3 3,3 9 ); Britiso Honpvras, 
Rio Sarstoon (Blancaneaux: 2 2); Guatemaa, Duefias (Champion: 1 ¢ ), Livingston 
[1 3], Puerto Barrios [2 3], Los Amates [2 9], Gualan [8 ¢, 5 2 + 2 pairs] 
(Williamson, Deam, Hine, colls. Willmsn., O. 8. U.); Panama, La Chorrera (Dolby- 
Tyler *).—CotomBia, Bonda in Dept. Magdalena (H. H. Smith, Carn. Mus. Pittsb.: 
5g, 19); Venezvera (U.S. NV. M.: 1 3), Puerto Cabello’ (dppun?); Guana, 
