Oilonata from Mesoputamia. 295 



Lindenia tetraphyUa^ Lind. 



11 c? J, 12 ? ? , 6-9. v., 13-15. v., 25-31. v., 1-5. vi. 

 (Amaru). 



In lite this is evidently a very remarkable-looking and 

 beautifcul itisect. The long description of the adult male in 

 the ' Mon. des Goniphines,' p. 559, is in some respects a 

 little difficult to follow, and altliough there may be variation 

 in tiie 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 wiiicli the colours had de- 

 teriorated. For example, the abdomen is stated to be blackish 

 with obscure yellow marking.'', while in the diagnosis in the 

 * Kevue 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 scarcer 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. The female is taken as the model, as 

 ills remaiks on the male are comparative therewith. 



$ . 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 antennas greenish ; occiput yellow ; frons 

 (except as above), clypeus, labrum, genaj, 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 liie 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- 

 rujited and expands at the stigma, the third continued ventrad 

 to near the hind coxai. Legs yellowish, femora with a long 

 wedge-shaped black markijig above, the middle pair with the 

 trochanters and the femora on their inner surface blackish; 



