NEUROPTERA. 387 
‘“‘horns” in same position as those of the male, conical, much shorter and apparently broken off apically ; 
abdominal segments 1-7 dark metallic-blue on dorsum, sides inferiorly and a basal ring on 2-7 (mid- 
dorsally interrupted on 3-7) yellow; 8-10 pale (blue?), 9 with a longitudinal blackish stripe each side 
from base to three-fourths length; appendages a little shorter than 10, genital valvules hardly reaching 
beyond the tips of the appendages, but the “ palps” of the valvules reach beyond them; no vulvar spine 
on 8; tarsal claws toothless; hind wings with 11 postcubitals, ultranodal sector arising at ninth post- 
cubital on all wings, upper sector of the triangle ending between the 8th and 9th, lower sector of 
triangle ending near level of 5th or 6th postcubital. 
Dimensions.—Abdomen, ¢$ 38°5, 2 34:5; hind wing, ¢ 21:5, 2 22'5 mm. 
Hab. Guatemata, Livingston (Williamson, coll. ejusd.: 1 9); Nicaragua, Escondido 
River, 50 miles from Blewfields (C. W. Richmond, U.S. N. Mi: 1 3). 
Mr. Williamson records that he took the female “in a room in town.” 
ISCHNURA (p. 122). 
Ischnura ramburi (p. 124), 
The statisties given on the next page appear to indicate a geographical variation in the number of post- 
cubitals. These’ figures, although based on scanty data, indicate a tendency toward a greater number of 
postcubitals in both sexes at Amatitlan as compared with Belize, and in each locality a tendency for the 
females to possess a greater number of postcubitals than the males. This latter, sexual, difference has 
been alluded to (anted, p. 127, line 18). It will be noted also that the Amatitlan examples are slightly 
larger than those from Belize, which, taken in conjunction with the data given in the table (anted, p. 125), 
may indicate that, in the tropics, the size of ramburi increases with the altitude. 
The distinction between “olive” and “orange” females is by no means a sharp one. Four olive females 
(Altamira, Belize, Amatitlan) and two orange females (Belize) have their pale postocular spots not con- 
fluent, or barely confluent, with the pale colour of the rear of the head (cf. key to females, 2, anted, 
p. 123). 
ramburi, type form (p. 124). 
To the localities given, add :—Mexico, Altamira | Hoag: 42, ‘Lol. @ ] in Tamaulipas, 
Ocotlan [Calvert: 1 pair+2 or. 9] and Chapala [tbid.: 1 bl. 2, 2 ol. 2 ] (coll. P. P. GC) 
in Jalisco; British Honpuras, Belize [1 pair+6 ¢, 1 or. 2]; Honpuras, Puerto 
Cortez [1 ¢, 1 or. 2 | (Williamson, coll. ejusd.). 
Var. credula (p. 125). 
Ischnura ramburi, var. credula, Baker, Invert. Pacif. i. p. 86 (1905) °. 
To the localities given, add :—Mexico, Guzman [Calvert: 4 3,1 bl. 2, lor. 9 ] in 
Chihuahua, Altamira [Hoag: 1 ¢] in Tamaulipas, Ocotlan [Calvert: 1 bl. 2] (coll. 
P,P. ¢.) in Jalisco; Britisq Honpuras, Belize [1 pair+7 3,2 bl. 9, 7 or. 2]; 
GUATEMALA, lake on railroad west of Guatemala City [2 ¢ |, Amatitlan [81 3, 12bl. 2, 
17 or. 2, 21 ol. 2 ]; Honpuras, Puerto Cortez [1 3, 2 ol. 2 ] (Williamson, Hine, colls. 
Wilmsn., O. S. U.); Nicaragua, Chinandega ! (Baker, coll. P. P. C.: 1 3). 
Ischnura denticollis (p. 126). 
2 (black or homeeochromatic). The Ocotlan example has the pale postocular spots very small, the blue 
antehumeral stripe represented by a small inferior spot only. That from Toluca has the antehumeral 
stripe represented by a cuneiform blue spot at what would be the upper and lower ends respectively. 
