413 



NOTES ON AFRICAN CHALCIDOIDEA— IV. 



By James Waterston, B.D., B.Sc, 

 Imperial Bureau of Entomology, London. 



TiMiODERUS, gen. nov. 



$. The entire integument of the head and body metallic and shagreened, or 

 highly raised reticulate ; the abdominal tergites being a little smoother. Head 

 in profile triangular, from above somewhat thin, shallowly concave across the frons, 

 rounded behind the eyes from vertex to genae ; but medianly, behind the raised 

 ocellar traingle, there is an inconspicuous ridge before the occiput ; from in front, 

 exceedingly wide, the scrobes set close together in the middle of the face, well abov6 

 the base line of the bare eyes. Labrum long, spade-shaped, conspicuous ; mandibles 

 similar, bidentate, a little asymmetrical. Antenna thirteen- jointed, with simple 

 cylindrical joints ; the divisions of the club indistinct. Thorax much swollen; 

 pronotum almost concealed behind the head ; nearly separated into two tergites ; 

 prosternum posteriorly truncated, triangular ; mesonotum with the parapsidal 

 furrows fine and hardly traceable. Axillae quadrate, touching, or only separated 

 narrowly (?). Scutellum with a transverse suture before the unarmed, rounded 

 apex ; mesopleural femoral furrow well-marked, and the prepectus rather large. 

 Wings : forewings with the post-marginal almost obsolete ; radius very short, 

 with a terminal group of clear cells instead of the usual linear arrangement. Hind 

 wings with the submarginal cell long and wide. Legs : fore coxae long ; hind tibiae 

 bicalcarate without apical comb. Abdomen sessile or practically so ; broad, depressed 

 and broadly concave above ; very shortly carinate (basal one-third) below. The 

 first tergite (which with ii. and iii. is posteriorly, medianly notched), covers three- 

 fourths of the surface ; tergite ii. reaches the edge ; the third is on the edge ; while 

 tergites iv., v., vi., vii. are all ventral in position. The ovipositor is broad, stout, with 

 strong teeth on the needles and central piece. 



Timioderus refringens, sp. nov. (figs. 1, 2, 3). 



5. A dark metallic blue or emerald green species, refringent on every part of 

 head, thorax and abdomen. The ground colour of head and thorax is blue overlaid 

 with green or bronzy green. The purest blue appears on a broad central line on the 

 naid lobe of the mesonotum, and again on the apex of the scutellum beyond the 

 suture. Antennae dull black, the scape browner and paler beneath. All the coxae 

 are blackish brown, except on outer aspect, where the metallic tints of the thorax 

 are reproduced ; all femora blackish brown, non-metallic to about one-sixth before 

 the apex, the apices of tibiae and tarsi pale ; the tarsi are slightly infuscated towards 

 the apex and the claws are blackish brown. 



