224 Annals of the South Afi-ican Museum. 



from the description, Gonioprymmis differs in having the spiracles 

 on the first abdominal segment placed at the apex of the basal 

 third, not "in medio sitis"; the first joint of the flagellum is dis- 

 tinctly longer than the second ; in Moansa it is shorter ; in the 

 latter the sixteenth to nineteenth joints of the flagellum are com- 

 pressed and flattened and each of them bears one or two spines, 

 which are slender, elongated ; in Gonioprijmnus it is only the nine- 

 teenth joint of the flagellum, i.e., that before the terminal three — 

 those which are turned off at an angle — which bears spines. The 

 antennae are twenty-two-jointed as in Moansa; the three terminal 

 joints are hardly compressed and not thicker than the preceding ; 

 the apical two are almost equal in length ; the basal is distinctly 

 shorter. 



The Malay species referred by Tosquinet to Moansa (M6m. Soc. 

 Ent. de Belgique, 1903, pp. 57-67) are clearly not genex'ic with 

 the African Moansa ; they have the median segment areolated as in 

 the Malay genera Epicorides, &c. 



The Genus MACEOGASTER, Brulle. 



The genus Macrogaster was described by Brull6 in the fourth vol. 

 of the Hist. Nat. des Ins. Hym6nopt6res, p. 184, on an insect from 

 the Cape of Good Hope, M. rufipennis, which was figured on PL 41, 

 fig. 4. This genus has always been a puzzle to me. Neither the 

 description nor the figure is good ; e.g., the joints of the tarsi are 

 said to be "allonges et tr6s courts," whatever that means. Mr. 

 Frederick Smith described from Borneo a Macrogaster which was no 

 Cryptid (Brull6 placed Macrogaster at the head of the Cryptides) 

 but a genuine Pimplid belonging to (according to my views) the 

 genus Epirhyssa, Cresson, a genus which differs mainly from Bhyssa 

 in the forewings having no areolet. The late Dr. Tosquinet describes 

 (M6m. de la Soc. Ent. Belg., 1903, p. 258) Macrogaster flavopictus, 

 Smith, from Borneo ; which is, I have no doubt, an Epirhyssa. I 

 am now inclined to believe that the genus which I described in the 

 Annals of the South African Museum, v., p. 127, under the name of 

 Ctenotoma, is very probably identical with Macrogaster. In the 

 figure of M. rufipennis the transverse cubital nervure in the fore- 

 wings is shown to be interstitial ; the transverse median nervure in 

 the hind wings is unbroken, the head is shown to be narrowed, not 

 dilated behind the eyes, and it is a more slenderly built species than 

 any of the species of Ctenotoma that I have described. Still, as 



