NOTES ON AFRICAN CHALCIDOIDEA^III. 241 



two preceding species. Sense-organ extending from near the apex to within one- 

 fourth from the base and lying mainly along the voiitral edge, with a fringe of 9 bristles. 

 Pedicel two-fifths of the scape ; longer than the first funicular joint ; the club 

 segmented as in maiiripennis, shorter than the two preceding joints together, but 

 wider than the first funicular joint (7 : 4). Sensoria on funicle : (1st) 1, 0, 1, 1 ; 

 (2nd) 1, 1, 1, 1 ; (3rd) 1, 2, 1, 2 ; (4th) 1, 3, 1, 3 ; on club : (1st) 1, 4, 1, 5 ; (2nd) 

 1, 4, 1, 6 ; (3rd) 1, 3, 1, 2. In the antennal characters therefore, sculpturatus is 

 intermediate between airidavus and mauripennis. 



Length, 1 -5 mm. ; alar expanse, 3 mm. 



Uganda : South of Lake George, bred from larvae of a butterfly, Neptis agatJia, 

 Cram., 6.vi.l911 (C. C. Gowdey). 



Type, a 5 in the British Museum, one of a series of 2 (J (J and 55 5 $. 



The species described below, belongs to a group which shows more or less 

 completely the following characters :■ — 



cJ5. Antennae concolorous, at most the scape lighter. Propodeon simple, the 

 surface smooth and raised reticulate, but not pitted ; one keel or raised edge between 

 notum and pleura, with the spiracle lying outside without surrounding hollow. 

 Scutellar furrows deep. Legs robust, generally dark to near apex of femora and lighter 

 afterwards. Wings with one hair on the submarginal, and a non-setigerous pustule 

 a little nearer the wing base. Steel blue or black species ; many described from 

 dipterous hosts. 



Tetrastichus balteatus, sp. nov. (figs. 4, 6). 



2. Scape and pedicel of antenna pale, the latter a little darkened or smoky ; 

 funicle and club blackish brown. Head very dark, shining green, submetallic, 

 becoming blacker near the clypeus, with a tinge of blue on the frontal side of the genal 

 ridge. Mesonotum before the suture like the head ; on the scutellum the dark 

 blue tint is more apparent ; pleurae blackish brown. Wings hyahne, veins light 

 brown. Coxae black, with blue reflections on outer aspect of first pair ; femora black 

 to before the apex, thence to the claws the entire legs are yellow ; claws black. 

 Propodeon duller, abdomen more shining, like the head 



Head sl little wider than deep (6 : 5), with the eyes rather prominent and separated 

 by nearly 3J diameters. The bare post-scapal area is broad, but there are the usual 

 small bristles about the sides of the frons. Scrobes clear of the base line of the 

 eyes, with only 1-2 minute bristles between. Below each scrobe are two similar 

 bristles, but only one or two occur lower above the clypeus. Antennae (fig. 4 d) : 

 length, 0*8 mm. ; scape with subparallel sides (4 : 1) ; four widely spaced ventral 

 bristles ; outside bare, except narrowly towards the apex ; one stout ring joint 

 and two thin laminae ; funicular joints, 6:5:5; club, 10 : 9 : 6. The funicle is 

 cylindrical and the club slightly expanded, its breadth compared with that of the 

 first funicular being as 5 : 4. Sensoria numerous; on funicle: (1st) 2, 10, 2, 10; 

 (2nd) 2, 6, 2, 8 ; (3rd) like 2nd ; on club (1st) 2, 10, 2, 10 ; (2nd) 1, 8, 1, 8 ; 

 (3rd) 1, 3, 1, 3. Mouth-jMrts. Mandibles with the lowermost tooth strong and 

 deeply separated from the inner pair, \\hich are rounded ; the upper edge is 

 narrowly incised in the middle. Labial palpus one-quarter of the maxillary. 



