162 PHILIP p. CALVERT. 



margin entire, apex rounded. The length of the lamina easily sepa- 

 rates /errw^ar/a from erythrcea Brulle $ . 



Seven males, two females, Kilimanjaro, Dr. Abbott. 



ORTHETKITM (Newm.) Karsch, Ent. Nach. xvii, p. 59. 



Oi'f lietruiii truiicatuin u. sp. % . — Head aud thoracic dorsum mostly 

 luteous, a black antehumeral stripe; sides of thorax reddish browu, an oblique 

 pale yellow stripe, partly margiued with black, behind each of the two lateral 

 sutures. Abdomen of shape of brachiale Beauv.. pruinose. Genitalia of 2 mod- 

 erately prominent. Anterior lamina slightly more prominent than hamule or 

 genital lobe, its apex slightly emarginate. Hamule bifid, branches widely di- 

 vergent; internal branch, when viewed from the side, thicker than the lamina, 

 its apes almost truncate, somewhat hooked on its outer side; external branch 

 much shorter, lying against the ventral margin of 2, its apex rounded. Genital 

 lobe either not quite or about as prominent as the internal hamular branch. 

 Wings hyaline, somewhat smoky, hind wings with a small yellowish cloud at 

 base. Pterostigma bright ochre yellow, merabranule cinereous, whitish at base. 

 Front wings: 11 — 14 antecubitals, 8 — 11 postcubitals, three posttriangular rows. 

 Hind wings: 9 — 10 antecubitals, 9 — 12 postcubitals, two posttriangular rows in- 

 creasing, sectors of triangle united at origin. Female unknown to me. 



Abdomen (incl. app. ) 27 — 30 mm. Hind wing 29 — 32.5 mm. 



Six males, Kilimanjaro, Dr. Abbott. 



Ortlietriini Abbotti n. sp. — Wings hyaline, extreme base fulvous. 

 Pterostigma yellow, membranule white. Front wings: 12 — 13 antecubitals, 9 — 

 10 postcubitals, three posttriangular rows. Hind wings: 10 antecubitals, 9 — 10 

 postcubitals, sectors of triangle separated at origin. 



'J,. — Face pale green, lips yellowish. Thorax pruinose, a band just behind 

 spiracle and sides behind second lateral suture greenish yellow. Abdomen of 

 brachiale group, pruinose. Genitalia of 2 prominent. Anterior lamina project- 

 ing farther ventrally than any other piece, swollen anteriorly, the swollen part 

 covered with minute denticles, apex emarginate; hamule with apex bifid, in- 

 ternal branch rather slender; external branch shorter, twice broader, apex 

 truncated. Genital lobe moderate, not as prominent as internal hamular branch. 



9 • — Luteous. Abdominal carinae and sutures, lateral margins of 4 — 7, dorsum 

 posteriorly, mostly black ; sides of 8 dilated about as much as in brunnea Fonscl. 

 Vulvar lamina not projecting farther than apex of 8, margin straight, entire. 



Abdomen (incl. app.) % 25 mm., J 24 mm. Hind wing '^ J 28 mm. 



One male, one female, Kilimanjaro, Dr. Abbott. 



Orthetrum bracbiale Beauv.? lus. Afr. Amer., p. 171. 

 The specimens which I have identified as of this species may be 

 recognized at all ages by the following structural characters : 



'^ . — Genitalia of 2 prominent. Anterior lamina much as in brunnea Fonsc, 

 with sides rounded to the apex, which is truncated and slightly emarginate; 

 hamule with the apex bifid, branches parallel, of equal length, but obliquely 



