E. B. WILLIAMSON 
235 
thirty-two males, fourteen females seen by me, all from Dr. 
C'alvert who has other specimens from the same localities. 
Trinidad: Diep;omartin River, February 29, and March 7, 
1912; C'unapo River, February 27, 1912; San Juan, March 2, 
1912: a total of thirty-one males, eight females. 
Type . — cf ; Rio Medio, east of Santa Cruz, Costa Rica; Jan. 
22, 1910: 9, allotype; Rio Santa Barbara, Costa Rica; Jan. 28, 
1910; in the collection of P. P. Calvert at the Academy of 
Natural Sciences, Philadelphia. The specific name esthera has 
been suggested by Dr. P. P. Calvert for this species in honor of 
Senora Ester de Tristan, wife of Professor J. Fidel Tristan, Pro- 
fessor Tristan having participated in the collection of the first 
known lot of specimens in Guanacaste, Costa Rica, in January, 
1910. 
This species, in de Selys’ grouping, belongs with rubriventris, 
sylvatica, and rufithorax. However, its closest relative is amelia, 
from which it is distinguished at once by the paler abdomen in 
both sexes. The following notes on living colors have been given 
me by Dr. Calvert: “ d' . — Ej^es dark brown with blue or green 
reflections above, changing rather abruptly to pale green with a 
black pseudopupilla below, upper surface of head predominantly 
black with reddish lines. Thorax aliove rather dull red with 
black markings; sides pale brown with black markings at su- 
tures. Dorsum of abdomen: posterior end of one and nearly 
all of two to nine bright red, most of one and ten black, the latter 
with a pair of red spots; articulations each with a narrow trans- 
verse black ring; sides of apex of five and entire sides of six to 
nine blackish, black rising to dorsum subapically, and on eight 
and nine meeting in the median line. 9 • — Eyes olive green 
above, pale green below. Colors of head and thorax pale brown 
with black lines and stripes. Dorsum of abdominal segments 
one and two jiale greenish, a pair of spots on one and a right- 
angled U, open anteriorly, on two, brown; dorsum of three to five 
pale red, of six to ten pale brown; intersegmental articulations 
from one to two to six to seven blackish, from seven to eight to 
nine to ten dull lavender; three to seven have a pair of transverse 
subapical darker brown lines; eight and especially nine a trans- 
verse apical lirown stripe; four to seven an indistinct lirown 
longitudinal line on each side; pectus and ventral surface of 
TRANS. -\.M. ENT. SOC., XLIII. 
