100 



BUKMEISTER S ODONATA. 



A re-examiuation of the two individuals referred to caffra, ou Dr. 

 Hagen's authority, in Proc U. S. Nat. Mus. xvi, p. 584, will be 

 necessary before deciding whether they really are such. 



6. Orthetriiin Abbottii Calvert. 



0. a. Calvert, Trans. Am. p:nt. Soc. xix, p. 162, 1892 ; Proc. U. S. Nat. Mus. xviii 

 p. 133, 1895 (1896).— Kilinia Njaro. 



I saw (and, I believe, labeled) some individuals in the Museum 

 fiir Naturkunde, at Berlin, and in the K. K. Hofniuseuni, at Vienna, 

 which I regarded as belonging to this species, but I can not tind any 

 note as to the localities from which they came. I did note that these 

 individuals had one row of cells between the subnodal sector and the 

 supplementary sector next below, that the membranule was some- 

 what grayish, and that the male at Vienna has 9 (right) 8 (left) 

 postnodals on the front wings. The male at Vienna was placed 

 under anceps Schneider, but I believed that at least two species were 

 there included. I know nothing of the types of anceps, which was 

 described from females from Asia Minor, but a comparison of the 

 description in Revue des Odonates, p. 291, with mine of 1896 shows 

 the following differences : 



Anceps J 

 29.7 mm. 

 33.7 

 2.8 

 strongly crenate 

 broadly crenate 

 nncolored (adult), of a 

 yellow tint on the costal 

 border and especially at 

 the base (young), 

 with two small posterior 

 black spots on each seg- 

 ment, 8-10 chiefly olive 

 (adult) or yellow (young) 



If the male from Beirut, doubtfully referred to anceps by de Selys 

 (Ann. Sdc. Ent. Belg. xxxi, p. 16, 1887), really be that species, then 

 we have the followin"' differences for the male sex : 



Abdomen 

 Hind wing 

 Pterostigma 

 Vertex 



Vulvar laniiua 

 Wings 



Abdominal segments 



Abhottii 9 

 24 

 29 

 3.5 



truncated 

 straight, entire 

 an extremely small ful- 

 vous cloud at base of the 

 long veins. 



such spots absent, 8-10 

 chiefly black. 



Abdomen 

 Hind wing 

 Pterostigma 

 Anterior lamina 



Front wings with 



Anceps f % 

 22.5 mm. 

 26. 

 2. 

 little prominent 



10 antenodals 

 6 postnodals 



Abbottii % 

 25. mm. 

 28. 



3.5-4 

 more prominent than any 

 other genital piece 

 12-13 antenodals 



8-10 postnodals 



