122 



[November, 



with grey, the latter having three longitudinal grooves, one between the anteniifc, 

 and extending from the base of the clypeus to the ocellus, the two others, broader 

 and much shorter, on each side of the first ; clypeus with a longitudinal central 

 carina, the anterior margin produced and deeply curved in the middle, the angles a 

 little acute. Thorax ferruginous, the posterior margin of scutellum, the post-scu- 

 tellum, the mesothorax beneath, and the metathorax (except the sides and two large 

 triangular spots with their tops uniting between the disc and the truncation), black ; 

 the metathorax finely shagreened above, with a longitudinal central line, the trunca- 

 tion smooth and shining, with a longitudinal oval groove in the centre. Wings 

 hyaline, with a beautiful whitish-blue iridescence in certain lights, and with a fuscou i 

 cloud at the apex, beginning with the marginal cell, the second submarginal cell, &c. ; 

 the tegidae and the costal nervure before the black stigma pale ferruginous, the other 

 nervures dark fuscous. Legs ferruginous, except the upper-side of the intermediate 

 and posterior coxae and trochanters, and of the base of the intermediate femora and 

 metatarsi, which is black ; the inner-side of the posterior femora, the upper side of 

 the posterior tibiae, the posterior metatarsi, and the apical spines of the intermediate 

 and posterior tibite, are also black. Abdomen black and shining, the apical segment 

 dark fuscous ; the posterior margin of the segments very thinly covered with short 

 grey pubescence. 



Sent from Congo (Soutli West Africa) by the late Mr. M. Gr. ran ^{ 

 Woerden (in Dr. E. Piaget's collection). 



P. ElTSEM^, sp. n. 



^ . Length about 10 mm. Head and antennae black, the anterior half of the 



clypeus, the scape of 

 the antennae in front 

 and the mandibles, 

 pale ferruginous, the 

 latter black at thei" 

 tips ; clypeus, scapo 

 in front, cheeks, base 

 of mandibles and of 

 the exterior orbit of 

 the eyes, densely co- 

 vered with silvery pu- 

 bescence, and the face 

 thinly with grey, the 

 latter having three 

 longitudinal grooves; 

 one between the an- 

 tennae and extending 

 from the base of the 

 clypcvis to the ocellus, 

 the two others, 

 broader and much shorter, on each side of the first ; the clypeus with a longitudinal 

 central carina, the anterior margin slightly curved in the middle, the angles rounded. 

 Thorax black, smooth, and (except the scutellum) not shining ; the mesothorax with 

 a little circular pale ferruginous spot beneath the anterior wings, the under-side, and 



fig. a. — Piagetia RiUemw, niihi, $ . 



6.— Head of ditto „ ? . 



c. — Hind leg of ditto ,, §. 



d. — Hind leg of P. Woenleni, niilii, <J. 



e. — Clypeus of ditto ,, <J. 



