278 Mr. Kenneth J. Morton on 



Unfortunately I failed to take the species at Albarracin, 

 but I possess a (^ from there (Miss Fountaine, 29, vi. '03) 

 which shows a tendency towards the Algerian examples 

 mentioned below. The shape of the dorsal marking on 

 2nd segment is much as in Fig. 5. The virgule on labrum 

 is rather paler. 



My acquaintance with Cordulegaster from northern Africa 

 is restricted to three fine males from Algeria given to me by 

 Miss Fountaine. On the whole these seem to be sufficiently 

 well characterised to deserve a distinctive name. 



Eace algiricus, nov. 



Q. Frons yellow without transverse frontal line; nasus yellow 

 with the exception of two short black anterior lines; rhinarium 

 black ; labrum with the proximal margin black ; virgule browiush ; 

 occiput yellow with yellow hairs. The white line behind the eyes 

 broader than in annidatus. 



Thorax : humeral spot when present extremely minute ; median 

 lateral band usually broken up into 4 spots. 



Abdomen black with yellow markings. Median yellow band of 

 segment 2, broad continued on the sides without interruption ; pos- 

 terior lunules large and connected by a narrow line with the lower 

 yellow patch ; dorsal black marking trilobate on anterior margin, 

 the middle lobe narrowest and most prominent. On 3rd segment 

 yellow dorsal marking occupies about J of segment and is continued 

 cephalad to the ventral suture and proximal edge of segment; in 

 segments 4, 5 and 6 dorsal yellow markings not occupying quite 

 ^ of segment; yellow on 7th about ^ of segment; lunules on seg- 

 ments 3 to 7, those on 3 and 4 large. iSegments 8, 9 and 10 much 

 marked with yellow above and on sides. 



Antenodals : fore wings 17-19; hind wings 12-14. 



Length of abdomen 55-58 mm. 



Length of wings 41 1 6 mm. 



Pterostigma of forewings 3i-4 mm. 

 „ liindwings 4r-4J- mm. 



Z <$<$: Sebdou, 29, vi. 9. vii. '04; Tlemcen, 14, vii. '04. 



Some time ago I received from Staudinger of Dresden a 

 pair of Cordulegaster bearing the label " Tiflis Caucasus." 

 They rank amongst the finest of the C. annidatus group, 

 and, supposing no mistake has been inade regarding the 

 locality, they are of particular interest in respect that they 

 appear to be nearer to the African than to the other races. 



