Mr. R. E. Turner on Foaaorial Hymenoptera, 93 



as the third. Serration of the hind tibiae almost obsolete. 

 Radial cell broadly truncate at the apex ; recurrent nervure 

 received close to two-thirds From the base of the cubital 

 cell. 



Hah. Zungeru, N.Nigeria (./. W. Scott -Macfie), January- 

 February L911. 



Rkopalum spina lifer. Bp. n. 



J. Niger; scapo, pronoto, postscatello, callis humeralibus, pedibus 



anticis intermediisque, trochanteributi coxisque exceptis, flu vis ; 



1 1 1 ■ 1 1 1 is abdominalibua duobus basalibus subtus lateribusque, 



uicntis sexto apice, Beptimoque, femoribus posticis apice, 



tihiis posticis supra nigro-maculatis, metatarsisque posticis basi 



ferrugineis ; tegulis brunneia ; alis hyalinis, iridescentibus, veuis 



nigris; petiolo apice spina minuta arraato. 



Long. -4 mm. 



cj . Eyes separated at the base of the clypeus by a distance 

 about equal to the length of the scape ; antennae short, the 

 basal joints of the flagellum normal, not tubcrculate or 

 em alginate. Head subopaque, very minutely punctured ; 

 posterior oeelli as far from each other as from the eyes. 

 Pronotum transverse, not rounded at the angles; thorax 

 subopaque, minutely and closely punctured. Petiole rather 

 stout, distinctly swollen at the apex, with a small spine at 

 the apex on the dorsal surface ; the second tergite half as 

 long again as the first, broadened from the base, no longer 

 than the third. Hind tibiae stout, distinctly but not strongly 

 serrate. Radial cell very broadly truncate at the apex ; 

 recurrent nervure received just bej'ond the middle of the 

 cubital cell. 



Hub. Kuranda, N. Queensland (F. P. Dodd). 



In the form of the petiole and following segments this 

 resembles R. frenchii, Turn., but differs much in colour and 

 in the remarkable spine on the petiole. 



Rkopalum imbelle, Turn. 



fflio alum tricolor, Sm., subsp. imbelle, Turn. Arm. & Mag. Nat. Hist. 



- 



In addition to the distinctions given in the description, 

 the male antennae are much shorter in imbelle than in 

 tricolor ; the third joint of the flagellum, which is emarginate 

 beneath, being more than twice as long as the apical breadth 

 in tricolor, and scarcely half as long again in imbelle. On 



