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on the Bionomics of Southern Nigerian Insects, 433 
The general appearance of the Awka-Udi association, 
with the exception of the 9 M. vestita in IV., is much darker 
than the Ibadan series illustrated on Plate B of the 1916 
Proceedings. The latter, in fact, gives an impression of 
orange insects with black bars, the former of black insects 
with narrow yellow or orange bars, which in C. chevrolati 
are broken up into spots. The two M. afzelii and two of 
the M. vestita in II., however, have lost the appearance of 
barred forms, the latter beimg melanic, with only faint 
traces of orange, the former orange anteriorly and black 
posteriorly, thus resembling, although much darker than, 
the vars. of D. affinis, M. hermannioides and M. farqu- 
harsoni in which the anterior black elytral band is want- 
ing (Proceedings, 1916, pp. evii-cix). The much blacker 
appearance of afzelii is due to the posterior orange bar being 
obsolete or absent. One of the 9 vestita in IV. resembles 
the Ibadan forms of the same variety. 
Comparing the size of the beetles in the two localities, 
M. afzelii is much larger than any of the Ibadan series, 
' iM. vestita of about the same size, the other three species 
considerably smaller, this being true of the four examples 
of the only species common to the two—C. hermanniae, 
which is smaller as well as darker than the Ibadan average. 
It is probable that the Ibadan hermanniae has converged 
towards D. affinis and the dominant MW. farquharsoni, the 
Awka-Udi hermanniae towards M. tibialis and the domi- 
nant C. chevrolati; but much larger numbers are required 
to test this conclusion thoroughly. Larger numbers are 
also required in order to determine the extent and the 
meaning of the difference indicated by a comparison between 
the three specimens of MW. vestita from locality II. and the 
nine from IV. 
The Mylabrid beetles here tabulated were accompanied 
by seven examples of a fine Homopteron, the Cercopid 
Locris maculata F. with the label “ widespread in the 
Awka-Udi districts, also at Ibadan.” Six of these are yellow, 
b!ack-marked insects with considerable general resemblance 
to but less dark than the Mylabrid vars. which have lost 
the anterior black bar; the seventh is nearly melanic, the 
yellow being reduced to two narrow bands made up of small 
spots. This form resembles the two melanic M. vestita. 
A further collection with precise localities would be of much 
interest.—H.B.P.] 
2. Erotylid Beetles aestivating in the empty Clay Cells of an 
Aculeate Hymenopteron. 
