132 



EAST AFRICAN ODONATA— CALVERT. 



Vy^ 



their origin ; ' two (or three) rows of posttriangular cells ; triangle free, 

 no internal triangle. 



The female differs from the male as follows: 



Colors agree generally with those of younger males. 



Abdomen a little dilated and compressed 

 at base, thence gradually tapering to the 

 apex; .VG like 5-6 in the male; lateral 

 margins of 8 dilated as much as in 0, 

 quadrupla., Say: 10 yellow. 



Vulvar lamina not projecting beyond the 

 apex of 8, its margin entire, but slightly 

 bent at the middle toward the abdomen, 

 thus having the appearance of being emar- 

 ginate; this bent portion has a very small median carina. Median 

 ventral carina of 9 well developed. 



Appendages yellow, more than twice as long as 10, but hardly as 

 long as 9; apices acute, slightly brownish; tubercle between them yel- 

 lowish, not quite half as long. 



A very young male and female belong also to this si^ecies; they have 

 the greater part of their bodies luteous, as in young imagoes of 0. 

 cceruleseens, etc: 



Fig. 9. Fig. 10. 



ORTHETRUM BRACHIALE, Female. 

 (9) Ventral view of apical margin of vulv 

 lamin-i; (10) Apical margtn of vulvar lanirn 

 viewed froin behind. 



Measurements of Ortheirum hracliiale. 



Locality. — Two males and one female in the National Museum collec- 

 tion, from Zanzibar (one of these also marked ''Taviite, Jan., '89"); 

 fourteen males, one female in the NTitional Museum collection, from 

 Kilimanjaro. 



As indicated, the identification of this species as 0. hracliiale is some- 

 what doubtful; I have relied chiefly upon Baron de Selys' brief com- 

 parative description.^ No detailed description of 0. hrachialc has 

 hitherto been published. Dr. Hagen kindly examined one male and the 

 female of the specimens from Zanzibar, and in September, 1890, wrote 

 to me of them : " It is, I believe, the same species quoted by Burmeister 

 (p. 857) as L. sahina (not published) from the Comores Isles, perhaps 

 = L, harharaf .''"' L. sahina, Burmeister, is not sahina, Drury, and the 

 present species is not harhara, Selys {=chrysostigm'a, Burmeister). Dr. 



'Variations iu reticulation: Two males have no hypertrigonal in the right 

 front wing: one has two hypertrigonals iu the left front wing; two have a cross 

 vein in the discoidal triangle of the left hind wing. 



2 Ann. Soc. Ent. Belg., XXXI, p. 21, 1887. 



