102 burmeister's ODONATA. 



10. Orthclriiiii RaiiMoniieti Brauer. 



Lib. E. Brauer, Verlidl. z.-b. Gesell. Wien, xv. p. 1009, 1865, translated by Selys, 

 Ann. Soc. Ent. Belg. xxxi, p. 20, 1887. — Sinai peninsula. 



The following notes on the two typers of Brauer in the K. K. 

 Hofniuseum at Vienna were made by nie in March, 1896. 



The two types of Ransonneti Brauer differ from hrachialis [Oa]\ .=contractii.m 

 Ramb.] in genitalia — not easily examined : genital lobe more prominent than 

 other parts, hamule with external branch shorter than the internal bi'anch and 

 shorter than in brachialis ; in the more prominent frons and clypeus, which, when 

 viewed from above, have an antero-posterior length equal to one-half the greatest 

 antero-posterior dimension of the eyes, whereas in brachialis the frons is one-third 

 of this dimension of the eyes; paler reticulation, especially of costa and ante- 

 nodals; the more trapezoidal form of the pterostigma inasmuch as the inner end 

 is more nearly at right angles to the costa than the outer end, whereas in brachi- 

 alis the two ends are nearly parallel ; pterostigma paler, yellowish ; no color at 

 the base of the hind wings, membranule grayish-white, wings more pointed at 

 apex, no hypertrigonals on any wings, arculus of all wings between the first and 

 second antenodals, submedian cross-vein on the front wings nearer than the first 

 antenodal, inner side of the triangle of the hind wings a little nearer the base 

 than is the anuilus ; abdomen less contracted at 3 ; third tibise with 9 spines on 

 either side. The two types have the body pruinose. 



11. Orllietriiiii leoiiinnm Karsch. 



0. I. Kaiscli, Ent. Nach. xvii, p. 59, 1891. — Sierra Leone. 



Two nominal species of Orthetrum, brevistylum Kirby, Proc. Zool. 

 Soc. Lond. 1896, p. 521, and lorti Kirby, I. c. p. 522, each based on 

 a single individual from Somaliland, present, as pointed out by their 

 describer, differences of generic value. Whether these differences 

 wdl prove constant remains to be determined by larger .series. 



Libellida Marchall Ranibur, from Mauritius, placed in Ovthetruin 

 in Mr. Kirby' s Catalogue of Odonata, p. 36, does not belong to this 

 genus, according to my no es on the two type males, one lacking the 

 head, the other lacking the abdomen, labeled "Maurice", at Oxford. 

 So also the Orthetrum laterale of Kirby's Catalogue /. c, is a Tri- 

 themis, as pointed out on page 65, mite. 



Besides the species hei'e treated of, the following Orthetra occur in 

 Africa : caneellatum L., Ramhurii Selys and riitiditierve Selys along 

 the Mediterranean coast; sabina var. africana Selys from the Came- 

 roons, and annulatmn Beauvois, of Owara, etc. To the knowledge 

 of these and of the species just described by Mr. Kirby in the 

 Annals and Magazine of Natural History for September, 1898, I 

 can add nothing. 



CORRECTIONS AND ADDITION. 

 Page 32, under (/) King's collection, change LiheUiila 23. analis to 22. Tillarga. 

 Page 35, last line of text and first line of footnote, change * to f. 

 Page 40. No. 13 Agrion hastulatuiii. Add: De Selys (Bull. Acad. Belg.— 2— sli, 



p. 273, 1876) refers "Agrion hastulatuni, Burm., no. 13 (Pars: I'exemp. 



du Cap.)" to Ischnura senegalensis Ram bur. 



