26 Annals of the South African Museum. 



femora, tibiae and tarsi darker. Wings hyaline, iridescent, the 

 stigma fuscous, the nervures darker coloured. ^ . 



Length 13-14 mm. 



Cape Colony. Neighbourhood of Cape Town. 



Antennae black, the scape rufous in the middle below, the flagellum 

 densely covered with a short, stiff pile. The second joint of antennae 

 not much longer than broad, the third about twice its length and 

 slightly shorter than the fourth. Apex of clypeus with a wide, 

 shallow, rounded incision. Hind ocelli separated from each other by 

 double the distance they are from the eyes ; they are flat, closely 

 rugose, except round the hinder and inner edges. Temples roundly 

 narrowed, as long as the eyes. Occiput roundly incised. Collar 

 short, above as long as the third antennal joint. Middle lobe of 

 mesonotum strongly, but not very closely punctured ; lateral lobes 

 almost impunctate ; a fine furrow down the centre ; the outer edge 

 with an irregularly crenulated furrow. Scutellum flat, more strongly 

 and deeply punctured than the mesonotum. Mesonotum punctured 

 round the furrows. Metanotum strongly, transversely reticulated, 

 with a stout keel down the centre. Pro- and base of mesopleurae 

 strongly aciculated ; the rest irregularly reticulated ; apex of pro- 

 pleurte depressed, irregularly crenulated. Hind coxae nearly four 

 times longer than wide, closely, strongly striated except at the base, 

 which is closely punctured. Hind metatarsus shorter than the other 

 joints united. 



This species is closely related to G. dunbrodyense, Cam.; possibly 

 it may be its 3 ; the occiput is more distinctly incised ; viewed from 

 above the collar is shorter ; the red on the mesopleurae is of equal 

 width, not broadly dilated towards the base above as it is in the $ 

 of dunbrodyense. The males appear to be rare compared with the 

 females. The only other male I have seen is G. lissocephalus, Cam. 



* G. lissocephalus, Cam., has the thorax entirely black, as in G. pul- 

 chripennc, with which it appears to be closely allied ; the abdomen 

 is black except for broad rufous marks on the apices of the second, 

 third, and fourth segments, the base of the third and fourth being 

 also narrowly red ; the four anterior femora, tibiae, and tarsi are 

 testaceous ; the hind legs are for the greater part black. The head 

 is broader than long ; the temples are as long as the eyes, slightly 

 narrowed ; distinctly so at the hinder edge ; the occiput is distinctly 

 roundly incised. The hinder ocelli are placed slightly behind the 

 eyes ; they are separated from each other by about the same distance 

 as they are from the eyes. Malar space as long as the pedicle of the 

 antennae. Antennal scape about three times, the pedicle about twice 



