49 PROCEEDINGS OF THE NATIONAL MUSEUM. you. 62. 
a wide range over the Mediterranean countries. It has been usually 
referred to a genus Hemianaz de Selys distinct from Anaz, as it lacks 
the supplementary carinae on segments 4-8 of the abdomen found 
usually in Anaz, and it has also a triangular lower anal appendage 
in the male, whilst other species of the genus have that appendage 
squarely truncate. 
These characters are, I think, of not more than subgeneric value 
and I follow Tillyard in allotting the species to the main genus. 
A second species is the beautifully colored immaculifrons Rambur 
which has been taken as far west as Damascus, and of which a geo- 
graphical race is recorded for Hongkong by Ris. I have not been 
able to find any record of its capture in the Indo-Chinese Peninsula, 
or in the equatorial areas of the region. 
The remaining oriental species of the genus are decidedly difficult 
to differentitate clearly, and their synonymy isobscure. The arrange- 
ment given below has been arrived at from a study of Ris’s papers 
quoted in the sequel (Ris 1913, 1913a), and partly from his opinions 
given me in correspondence on the subject, as well as from examina- 
tion of material available to me. As Ris has written me, it will at 
least serve as a working arrangement for the present. 
ANAX GUTTATUS Rambur. 
Without T-mark on frons. Thorax without black lines on sutures. 
Markings on abdominal segments 3-10 consist of yellowish brown 
spots, of which there are three on either side of the dorsum of segments 
3-6. Length of abdomen of male about 55 mm., of which the third 
segment occupies from 8.5 to 9.5mm. Upper anal appendages 6 mm. 
additional. Hinder wing 52 mm. long, pterostigma 5 mm. Range 
extensive, from the Seychelle Islands in the west to Samoa in the 
east. 
I have seen specimens from India, Ceylon, the Malay Peninsula, 
and Borneo. 
Doctor Ris remarks in a letter that the species appears to be well 
defined, and its characters constant. 
ANAX GIBBOSULUS Rambur. 
With a dark border to the anterior margin of the frons, connected 
by a bar of variable width to the black mark at the base of the frons. 
Markings on segments 3-9 of abdomen consists of small apical-lateral 
pale spots; in addition segments 3-5 have each a small basal lateral 
spot on either side. 
Length of abdomen of male about 62 mm., the third abdominal 
segment is about 11.5 mm. long and is relatively more slender than 
in A. guttatus. The anal appendages are 6.5 mm. in length, and 
the hinder wing and pterostigma measurements are about 55 and 5 
mm., respectively. 
