52 MR. F. F. LAIDLAW ON 
the base of the lip in the middle line; rhinarium yellow, marked 
below with a transverse black line. Nasus and frons brownish 
black ; the former has a small round yeliow spot on either side, 
the latter carries a pair of transverse yellow spots at its summit, 
these are separated narrowly in the middle line by black. Vertex 
and occiput entirely brownish black. 
Prothorax very dark brown, its under surface and base of the 
prothoracic limbs paler. 
Thorax rich chestnut-brown, marked with yellow as follows :— 
A mesothoracic half-collar divided by the black median dorsal 
carina ; a dorsal stripe on either side, incomplete below, and an 
antehumeral stripe constricted at its middle; a narrow band on 
the mesepimeron and a second band, likewise narrow, on the 
metepisternum. Nearly the whole metepimeron is yellow, its 
posterior border narrowly marked with black, whilst the meta- 
sternum is entirely black. 
Legs : Femora dark brown, the first pair with a narrow internal 
stripe; tibie and tarsi black. 
Abdomen largely black, segments 1, 2 brown below and at the 
sides, auricles brown, 2 with a yellow dorsal band narrowing to a 
pointat the apex of the segment ; 3, 4, 5,6 black, each with a small 
basal yellow mark dorsally, which is triangular in shape with its 
apex directed backwards (in the more adult of the two specimens 
these markings are of a brown colour rather than yellow). 
Anterior third of 7 yellow dorsally, 8, 9, 10 largely brown at 
the sides; the distal half of 10 is also brown dorsally ; laminee 
of 8 black. 
Anal appendages black; upper pair fully equal in length to 
9, 10 together, curved inwards a little and crossing each other 
like the blades of scissors. Each bears a strong sharp spine on its 
outer margin, rising at the junction of the inner and middle 
third of its length, and the inner margin of each is finely serrated 
near its apex. Lower appendage very short, almost concealed by 
the anal tubercle, abruptly truncate, with a small hooked spur on 
either side. 
This fine form is well characterized by the anal appendages, 
which are unlike those of any of the described species. The 
type-specimen has been examined by M. Réné Martin, who has 
very kindly informed me that it is identical with an example in 
the de Selys collection labelled 7. acutws, which has not been 
described. 
(The type is in the British Museum; co-type, Sarawak 
Museum.) 
*ICTINUS DECORATUS de Selys. 
Ictinus decoratus Selys, Hagen, Monogr. Gomph. p. 273, pl. 14. 
fig. 4; Kirby, Cat. Odonata, p. 77; Kriiger, Stettin. Entom. Zeitg. 
* Species marked with an asterisk are those of which I have not received examples 
from Mr. Moulton. 
