ERYTHEMIS. 300 
and to half-way between submedian cross-vein and triangle in the Altamira example; costal edge of 
stigma of front wing 2°5-3-3 mm. The colour-differences perhaps indicate that these males are younger 
than the type. 
Q (hitherto undescribed). The female from “ Choco, New Granada,” referred to bicolor, Erichs., by Hagen * 
is before me and is probably this species. Entire body luteous or yellowish, the following markings 
blackish: a median labial band 1:3 mm. wide, margins of the ante-alar sinus, carinee and sutures of the 
abdominal segments, most of the superior surfaces of the femora and of the first and second tibia, tarsi. 
Remainder of the legs reddish. Appendages ‘75 mm. long. ‘ips of the wings smoky-brown inward as 
far as the level of the distal end of the stigma; ante- and postcubitals as in the males; other details on 
page 330. 
Hab. Mexico, Altamira in Tamaulipas (Hoag, coll. P. P. C.: 1 3), Campeche 
(Dubosc, coll. Selys).—CouomBia, Barranquilla?, Choco (Schott®, M. C. Z.: 1 9); 
Perv, Jurimaguas (coll. Selys); Brazil, Coary (ibid.), S40 Paulo de Olivenca (ibid.), 
Minas Geraes (coll. R. Martin); Paraguay, Concepcion (H. H. Smith, Carn. Mus. 
Pittsb.: 2 3). 
The data quoted from the collections of MM. de Selys and R. Martin have been 
kindly furnished by Dr. F. Ris (in litt., 9. ix. 05). 
‘Taken in June (Altamira), August ? (Barranquilla), and December (Concepcion). 
The female differs from that of peruviana by the absence of antehumeral stripes and 
the coloration of the face; from that of attala by the reduction of the black markings 
on the abdomen to the sutures and carine; from that of simplicicollis subsp. collocata 
by the presence of yellow on the hind wings. 
4, Erythemis attala. 
Libellula attala, Selys, in Sagra’s Hist. Cuba, Ins. p. 445 (1857). 
Mesothemis attala, Hagen, Syn. Neur. N. Amer. p. 172 (1861)*; Kirby, Ann. & Mag. Nat. Hist. 
| (6) xix. p. 607 (1897)°; Calvert, Proc. Calif. Acad. Sci. (8), Zool. i. pp. 407-408 (1899) *; 
Prinzessin Therese, Berl. ent. Zeitschr. xlv. p. 262 (1900) °. 
Libeliula annulata, Ramb. Névr. p. 78 (1842) ° (in part., not of Beauvois *). 
Mesothemis annulata, Martin, Boll. Mus. Zool. Anat. Comp. Torino, xi. no. 240, p. 1 (1896) 7. 
Libellula annulosa, Selys, in Sagra’s Hist. Cuba, Ins. p. 445 (1857) *. 
Libellula mithra, Selys, |. c. p. 446 (1857) °. 
Mesothemis mithra, Hagen, Syn. Neur. N. Amer. p. 172 (1861) *°; Proc. Bost. Soc. Nat. Hist. xi. 
p. 293 (1867) ”. 
The view advanced elsewhere* that these names represent individual variations and not distinct species, or 
even subspecies (geographical races), receives additional support from the present material. Thus the 
males from Atoyac alone show a gradual transition from those in which the blackish-brown spot at the 
base of the hind wings reaches out to the first antecubital and the level thereof (attala, mithra), to those 
in which it reaches to the second antecubital, arculus, and triangle (annulosa) ; the maximum width of 
the hind wing in this series is 9°5-10°5 mm. Very nearly the same minimum and maximum extents 
of the basal spot are exhibited by the males from Daule and Quevedo in Ecuador. Among the males 
from Brazil the minimum is also the same (e. g. Cachoeira, Sta. Anna), the maximum extent exceeds that 
found at Atoyac in that the spot reaches to the third antecubital and level thereof in one example from 
* « Lib, annulata, Beauvois, the type in the Selys Collection is a male of the African Trithemis rubrinervis 
2x2 
—another puzzle for nomenclature.”—Dr. F. Ris, in litt., 2. iii. 05. 
