ANISAGRION. 105 
median vein and the principal sector; no densely reticulated area as in™ 
A. lais. Hind margin of tenth abdominal segment with a bifid dorsal 
process. Inferior appendages simple, slender, curved toward each other, 
longer than the superior appendages . . . . allopterum. 
BB. Apices of front and hind wings dissimilarly shaped, that of the hind - wings 
being truncated at the pterostigma so as to be markedly more obtuse than 
that of the front wings. Hind wings with the median vein not markedly 
curved, nor with more than a single row of small cells at the tip. (Apex 
of abdomen lost.) 2. . . 6. 2 6 ee ee ee ee ew ww ) Eruncatipenne. 
Females. 
Distal side of the pterostigma convex, meeting the costa almost at right 
angles, the anterior distal angle of the pterostigma being thereby less 
acute than the posterior proximal angle . . . . . . . . . + « « allopterum. 
AA. Inferior sector of the triangle arising as far in front of the submedian cross- 
vein as the latter is long. Apices of front and hind wings similarly shaped. 
Males. 
Hind wings with the median vein not markedly curved, but the tip beyond the 
pterostigma with a small densely reticulated area chiefly between the 
median vein and the ultra-nodal sector. Hind margin of segment 10 with 
no dorsal process. Inferior appendages widely bifid, the upper branch the 
longer, but shorter than the superior appendages . . . . . . . + ~ Jais. 
Females. 
Distal side of the pterostigma straight, meeting the costa at an acute angle, 
the anterior distal angle of the pterostigma being equal to or more acute 
than the posterior proximal angle. 2. 2. 1. 2. 1. ew we ee ee Lata, 
1. Anisagrion allopterum. (Tab. V. figg. 14, 18.) 
Anisagrion allopterum, Selys, Bull. Acad. Belg. (2) xlii. p. 953 (1876) ’. 
¢. The superior appendages have their extremities of the form of almost circular sockets, the acute down- 
wardly-directed apex shown in our figure being placed on the inner, or mesial, side of the socket. 
Dimensions.—Abdomen, ¢ 27-28, 9 24-27; hind wing, d 16-19, 9 17-19 mm. 
Hab. Mexico, “ Putla (Mexique Pacifique)”1; GuatemaLa (Rodriguez!; Candéze, 
coll. McLachlan with label “ Anisagrion allopterum, Selys,” in Selys’s handwriting: 1 ¢ ; 
M. C. Z.: 1 %); Costa Rica, Caché (Rogers: 1 ¢ ). _ 
Var. ? rubicundum. 
Race ? Anisagrion rubicundum, Selys, Bull. Acad. Belg. (2) xlii. p. 954 (1876) * 
Hab. Mexico, Putla (“ céte pacifique” 2); GuateMaLa, Duefias (Salvin, coll. McLachlan, 
with label “ Anisagrion allopterum, S., race ?rubicundum, Selys,” in Selys’s hand- 
writing: 1 ¢); Costa Rica, Caché (Rogers: 2 3g), Cafias Gordas 1200 metres (coll. 
Adams: 1°). 
BIOL. CENTR.-AMER., Neuropt., December 1902. p 
