Dragonflies from Sierra Leone. 221 



viglit angles, about lialf as long as ninth seginenf, elliptical 

 in outline, laterally compressed ; ninth ventral plate bioadlv 

 piojecting- on tenth segment (not visible at base). Supra-anal 

 tubercle large, black, densely covered with long black hairs ; 

 appendages small, acute, black. 



J^asal dark brown spot of wings slightly smaller than in 

 male : vestige in front wing; in hind wing to Anq. 2 in sc, 

 to arculns in costal half o£ m., halfway between Cuq. and t. 

 in cu., to apex of membranule in anal area. Anq. jfr4ui* 

 Abd. 30, hw. 43, pt. <4. 



This is oneof the most remarkable Libelbdinje seen by me. 

 Tn venation the incomplete h\st antenodal in the hind wings 

 is unique (al)sent in one of eight wnngs examined) in the 

 subfamily. 'J'he colour-system is, perhaps, still more extra- 

 ordinary : a very common pattern in Libellulinse, sky-blue 

 and black, is obtained, not as in all other known cases by 

 ])ruinosity, but by pigmentation, like the scarlet-red of so 

 many other forms, or the blue and black of iEschninas and 

 Agrionid;e. In fact, C. simpsoni might be called a blue 

 rendering of Rhodothemis rufa. 



I have pleasure in naming this beautiful insect after the 

 successful collector of Odonata in Sierra Leone, Dr. J. J. 

 Simpson. 



Pseudomacromia clirysohaphes, sp. n. 



Sierra Leone: 1 ,$ , Sandea, 14. vi., 1 S , Jahama, 28. vi., 

 1 y , Sonkonia, 31. v. 1912 {Dr. J. J. Siinj^son) [the male 

 from Jahama kindly given to the writer for his own collec- 

 tion]. 



Very large species. Group XL of table in Lib. In vena- 

 tion of discoidal and anal areas naavtv P. preiiosa, in pro- 

 portion of antenodal and postnodal part of wing nearer 

 P. eusehia ; differing from both by rich yellow markings on 

 thorax and abdomen, and in this respect similar to P. torrida. 



S ' — Labium in one specimen dull ochreous, median lobe 

 obscure, in other specimen blacki.sh, dull brown at free 

 margins. Labrum black, narrowly lined with ferruginous at 

 free margin. Face light olivaceous, a blackish curved line on 

 anterior margin of postclypeus. Frons ochraceous at sides^ 

 dark metallic blue above, gradually passing into dull ferru- 

 ginous at anterior margin. Vertex large, convex, entire, 

 metallic blue. Thoracic dorsum brilliant metallic bluish 

 black, markings very pale dull greenish, almost whitish : 

 narrow antehumeral line, to two-thirds height, about halfway 

 between median and humeral sutures ; slightly broader com- 

 plete line in front of humeral suture, continued in an equally 



