222 Z. BOUCEK 



on fourth tergite meeting in distinct angle medially, band at posterior margin of fifth tergite 

 crossing basal quarter of sheaths. 



Head only as broad as pronotum in middle. Ocelli large, lateral one its (maximum) diameter 

 from eye (this seems to vary in M. clavaforme in which OOL usually is greater), one diameter 

 from median ocellus. Relative measurements: breadth of head 52, length 25.5, height 48, 

 breadth of frontovertex 28, scrobes 18, lower face 22, its height 25, eye 34 : 22, malar space 10, 

 flagellum plus pedicellus 63. 



Pronotum with weak submedian depressions; lateral edge carinate in posterior half. Notaular 

 depressions anteriorly distinct in certain lights. Hind coxa in anterior half of depression above 

 lateral edge with narrow wedge-like streak without punctures but transversely striate, dull; 

 puncturation above distinctly denser than in M. clavaforme of same size. Hind femur relatively 

 broad, including teeth i-8i times as long as broad, basal tooth very broad, middle teeth dense; 

 puncturation very dense and rather fine, surface of femur appearing dull. 



First tergite almost exactly twice as long as broad, sublaterally with very dense and finer 

 puncturation than in M. clavaforme, along middle (Text-fig. 253) with impunctate but micro- 

 scopically reticulate streak reaching shallow basal fovea, just behind yellow spot for some 

 distance depressed at sides to appear subcarinate. Fourth tergite: median keel 0-92 times as 

 long as maximum breadth of tergite. Sheaths 0-93 length of hind tibia. 

 (J. Unknown. 



Biology. Unknown. 



Holotype $, Nigeria: Ibadan, Olokemeji (USNM). 



Micrapion biimpressum sp. n. 



§. 5 - 4— 6*2 mm. Another species very similar to M. clavaforme, hence in the following 

 stress is put on the differentiating characters. Yellow markings: pronotum anteriorly with 

 median transverse spot and tiny spots on shoulders, posteriorly with a line reduced at sides 

 (markings less apparent, though present, in para type), a dorsal spot anteriorly on first tergite, 

 lateral elongate maculae on fourth tergite, on legs fore and hind knees dorsally, dorsal edge of 

 fore tibia, mid tibia, ventro-basal streak on hind femur and mid and hind tarsi. Fore wing 

 moderately infumate, darker at anterior margin and (abruptly) in apical fifth. 



Head distinctly broader than pronotum (41 : 37); eyes with conspicuous pubescence; ocelli 

 of medium size, lateral one by barely more than its longitudinal diameter from eye; POL 

 nearly 2-5 times OOL; vertex fairly convex. Relative measurements: breadth of head 41, 

 length 21, height 37, frontovertex 22-5, scrobes 14, lower face 16, its height 19, eye 22-0 : 12-5, 

 malar space 9, mouth 12, flagellum plus pedicellus 50. First three flagellar segments sub- 

 quadrate or very slightly elongate; flagellum feebly clavate. 



Pronotal sides subparallel, slightly concave in middle; hind margin broadly emarginate; 

 dorsal surface very uneven: raised postero-median area delimited by deep depressions diverging 

 backwards from a small depression at front margin of anterior median macula; lateral edge 

 distinct but not sharp. Notaular furrows distinct in certain lights though otherwise very 

 vague. Dorsellum with conspicuous carina at margin, in holotype dorsally rather flat, with 

 coarse alveolae. Propodeum medially nearly as long as scutellum; plicae slightly diverging 

 forwards. Hind coxa in depression punctured only basad of dorsal tooth, impunctate area 

 produced forwards in form of a wedge above lateral edge, latter basally with very dense 

 argenteous pubescence. Hind femur about i-8 times as long as broad (teeth included), with 

 moderately dense and rather fine puncturation ; interspaces narrow but shiny. 



Gaster much as in M. clavaforme; first tergite 2-3 times as long as broad, narrow median line 

 smooth, keeled. Sheaths about 0-85 length of hind tibia. 



$. 3'4-7'0 mm. Judging from conspicuous pronotal depressions and relatively smooth 

 dorsal curve of gaster, along with some minor characters, there seems to be little doubt about 

 the conspecificity with the females. Smaller £ is black, with subdivided posterior yellow line 



