J))'iigonjiics from Sierra Leone. 221 



ritrlit :int;lc3, about halt' aa lojio; as ninth scfjnictit, elliptical 

 in oiitliru', laterally coniprossotl ; ninth vontial plate hroadly 

 piojectin^ on tenth segment (not visihlc at l)a.se). Supra-anal 

 tuherelcs ''"'o*') hlaek, densely covereil with loii^- black hairs ; 

 «pp<Mi(la<ies small, acute, black. 



Hasal ilark brown spot of wintjs slin;htly smaller than in 

 male : vesrige in front winp^; in hind winj^ to Anq. 2 in sc, 

 lo arculns in costal half of m., halfway between Cuq. and t. 

 in cu., to apex of menibranule in anal ar(Ni. Anq. jj— jj^l' 

 Abd. :50, hw. -la, pt. <.4. 



This is ontM)f the most remarkable Libellulina; seen by me. 

 In venation tln^ incomplete last antenotlal in the hind wings 

 is uni(|iie (absent in one of ei^ht wings examined) iti the 

 subfamily. 'J'he colour-system is, perha])s, still more extra- 

 ordinary : a very common pattern in Libellulina3, sky-blue 

 and bhu'k, is obtained, not as in all other known cases by 

 pruinosity, but by pigmentation, like the scarlet-red of so 

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

 Agrionidjo. In fact, C. simpsoni might be called a blue 

 rerulering of IxhoJotheviia rufa. 



1 have pleasure in naming this beautiful insect after the 

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

 Simpson. 



Pseudomacromia chri/sobaphes, sp. n. 



Sierra Leone :1c?, Sandea, 14. vi., 1 c?, Jahania, 28. vi., 

 1 5*, Sonkonia, I>1. v. 1912 {Dr. J. J. ISuuj^soti) [the male 

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

 tion]. 



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

 tion of discoiilal and anal areas nearer P. pretiosa, in ])ro- 

 portion of antenodal and postnodal part of wing nearer 

 P. euneh'ui ; differing from both by rich yellow markings on 

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



^ . — Labium in one specimen dull ochreons, median lobe 

 obscure, in other specimen blackish, dull brown at free 

 margins. Labrum black, narrowly lined with ferruginous at 

 flee margin. Face light olivaceous, a blackish curvetl 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, continuei,l in an ef[ually 



