98 burmeister's odonata. 



The types of Beauvois are in the collection of Baron de Selys- 

 Longchamps at Liege, Belgium, and have furnished the three descrip- 

 tions just quoted. They comprise three males and one female and 

 are labeled as follows: the notation (1), (2), (3), (n), (b), (e), (d), 

 is for the present purpose only. 



1 type (1) has the four pin-labels (a) "Oshna Bauv" iu faded black ink: {h] 

 "I'Afrique" in red ink, this is Serville's label ; (c) " L. brachialis" in faded black 

 ink; {d) a bit of unmarked paper, gold on one side, white on the other. 



%i type (2) has pin-labels as above except that (c) is a blue label with " L. 

 brachialis Beauv. % a renvoyer" iu de Sely's hand ; abdominal segments ri-10 

 are lacking. 



%, type (3) lacks label (a), but is otherwise as in (1). 



9 type has labels as in % type (1). 



The four types have the co.sta as far as the pterostigma, the cross-veins in the 

 costal and the subcostal spaces, and those between the median sector and the 

 upper sector of the arculus — yellow ; two rows of cells between the subnodal 

 sector and the supplementary sector next below. Male types (1) and (3) have the 

 sectors of the triangle of the hind wings arising from the same point, while % 

 type (2) and the 9 type have them slightly separated at origin. The genital 

 lobe is a little more prominent thau the anterior lamina or the hamule in "J, 

 types (1) and (3), while in '^ type (2) the anterior lamina is more prominent than 

 the hamule or the genital lohe.f Pterostigma ochre-brown. 3.5 mm. long, in the 

 males, paler yellow in the female. 



Otherwise agreeing with my description of hrachiale in Proc. U. S. Nat. Mus. 

 xviii, p. 130. 



Thanks to the kindness of Baron de Selys-Long('ham})s, I made 

 the foregoing notes at Liege, in August, 1896. 



4. Orlhetruin chrysostigiiia Bunneister. 



IJbellula c. Burm. Hdb. ii, p. 857, 1839; see i)age 85. onfe. — Teneriffe. 



0. c. McLachlan, Journ. Linn. Soc. xvi, p. 177. 1882. L. c. Selys, Ann. Soc. Ent. 

 Belg. xxxi, p. 18, 1887. 



Synonym? Lib. barbara Selys, Explor. Sci. Alger. Zool. iii, ]). 117, pi. 1, figs. 2, 

 2a-h, 1849; Eev. Odon. p. 306. 1850.— Algeria. 



Baron de Selys (/. c. 1887) considers barbara a synonym of chryso- 

 stigma. I saw the type of barbara, in August, 1896, therefore pre- 

 vious to my study of the types of chrysostigma. Recently, iu read- 

 ing the descriptions of barbara (/. c), I noticed this clause in the 

 description of the thorax: "Ton voit rap[)arence d'une seconde 

 raie pale des secondes ailes aux troisiemes pattes', an expression 

 which applies better to the description of caffra (page 79, ante) 



t It is such differences as this which have caused me to recede, to a certain 

 extent, from the opinion expressed in Proc. U. S. Nat. Mus. xviii, p. 130, that 

 •'the most reliable specific characters are to be found in the genitalia of the male 

 and the vulvar lamina of the female." 



