ORTHEMIS. 237 
is found at Medellin, but little above sea-level, and at Mexico City, at 7300 feet (2250 
metres) elevation; a comparison of the specimens from the two localities does not 
show any constant differences. 
The imago appears to occur at all months of the year, in at least a large part of its 
area of distribution, although no continuous record for any one place exists as yet. 
The present Mexican material has been taken in every month at one or another 
locality. Specimens collected in January are from such widely-separated situations 
as Victoria in Tamaulipas, and three others in Mexico, six in Guatemala, Esparta in 
Costa Rica, Brazil+, Sapucay in Paraguay, Porto Rico and St. Vincent’. July 
furnishes them from San Antonio, Texas, the Gila River, six Mexican localities, 
Corinto 9 in Colombia, La Guaira in Venezuela, Victoria in Brazil, and Cardenas !9 
in Cuba. In September they were taken at Acapulco at the sea-level and at Amula, 
6000 feet elevation. 
The existing literature 4121 contains some brief remarks on the habits of this 
species, to which the following may be added:—Mr. Biederman noted at Florence, 
Arizona, May 5: “Took one day to get four, do not rest at all.” Mr. Williamson, 
at Gualan, Guatemala, Jan. 13: “ Flight very swift, usually over small stretches of 
stagnant water along main stream or over irrigating ditches”; at Escuintla, Guat., 
Jan. 31: “Common along ditches in front of houses in the town”; “2 ovipositing, 
unattended by ¢, in open water in ditch, striking abdomen several times in one 
spot and not moving over large area unless disturbed.” Some of the material from 
Surubres, Costa Rica, is marked by Prof. Biolley as from ‘eau stagnante,” other as 
taken at the “ bord de la riviére Surubres.” 
2. Orthemis biolleyi, sp.n. (Tab. 1X. figg. 36, 37.) 
In addition to the details given on page 233 :— ; 
g. Frons superiorly and vertex metallic violet, nasus reddish-brown, rhinarium greenish ; labrum brownish- 
yellow, free margin narrowly black (wider in the Los Amates ¢ ), occiput dark brown, 
Predominant colour of thorax maroon-brown; mid-dorsal carina, some interalar spots, and the pale stripes of 
the sides bright sulphur-yellow. 
No dark dorsal markings on the abdomen; some greenish-yellow on the sides and under surface of segments 1 
and 2, a pair of brown anteapical ventral spots and some brownish streaks on 4-8, two yellow and one 
brown longitudinal stripe on each side of the under surface of 3 and, in some, also of 4. 
Superior appendages brown, longer than segment 9, not so long as 9+10, shaped as in O. Serruginea ; inferior 
appendage one-fourth to one-sixth shorter, almost similar to that of ferruginea. 
Pterostigma and membranule brown, or the former greyish. ‘Tips of the wings clear or barely edged with 
brown for one cell’s width. Subcostal and submedian spaces of hind wing faintly yellowish halfway 
to the first antecubital and halfway to the submedian cross-vein. Venation dark brown or blackish. 
Front wings with 15-18 ante-, 11-15 postcubitals; hind wings with 11-13 ante-, 12-16 postcubitals. 
@ unknown. 
Hab. Guatemata, Los Amates (V. Miller, coll. Williamson: 1 3); Costa Rica, 
Esparta (Biolley, coll. Kahl: 3 3); Panama, Bugaba (Champion: 1 3). 
Taken at Los Amates January 18, at Esparta in January and February, in the latter 
BIOL. CENTR.-AMER., Neuropt., August 1906. II 
