Odonata from Mesopotamia. 295 
Lindenia tetraphylla, Lind. 
11 og, 12 2 2, 6-9. v., 13-15. v., 25-31. v., 1-5. vi. 
(Amara). 
In life this is evidently a very remarkable-looking and 
beautiful insect. The long description of the adult male in 
the ‘Mon. des Gomphines,’ p. 559, is in some respects a 
little difficult to follow, and although there may be variation 
in the extent of the dark markings according to locality, it 
would appear to have been taken either from an exceptionally 
dark individual or from one in which the colours had de- 
teriorated. For example, the abdomen is stated to be blackish 
with obscure yellow markings, while in the diagnosis in the 
‘Revue des Odonates,’ p. 102, the abdomen is described as 
yellow spotted with black laterally, which seems to be the 
normal condition. In fully mature specimens, pruinescence 
tends to obscure the dark brown or blackish markings, 
especially of the thorax. The male is stated by the collector 
to be searcer than the female. 
The following is a brief description compiled from the 
collector’s MS. notes on the living insect, combined with his 
prepared specimens. ‘'he female is taken as the model, as 
his remarks.on the male are comparative therewith. 
2. General tint pale greenish marked with orange on the 
second and part of third abdominal segment. 
Vertex greenish, black anteriorly, which colour is con- 
tinued on the frons, forming a broad line produced slightly in 
the middle ; base of antennes greenish ; occiput yellow; frons 
(except as above), clypeus, labrum, genze, and labium shining 
whitish, mandibles darker shining black at apex. Back of 
head black, outer lower part, including greater part of the 
temples, yellowish. Eyes in life shining pale green inclined 
to bluish towards the lower surface. Pronotum mostly 
blackish, pale at the sides. -Thorax yellowish green, paler 
beneath, with dark brown or blackish markings ; two large 
median lines, broadest anteriorly, divided only by the median 
suture, and not quite reaching the anterior margin; ante- 
humeral lines in contact, or almost, with the median, a narrow 
pale space being thereby enclosed through the curvature of 
the median ; three lateral lines, one on each lateral suture 
and one between, the first widest in the middle and continued 
ventrad and caudad towards the middle one, which is inter- 
rupted and expands at the stigma, the third continued ventrad 
to near the hind coxa. Legs yellowish, femora with a long 
wedge-shaped black marking above, the middle pair with the 
trochanters and the femora on their inner surface blackish ; 
