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at the middle, the surface rather opaque, impnnctate, dark bhie or blackish ; 

 scutellum broad, triangular ; elji:ra convex, very closely, rather finely and 

 irregularly punctured, their epiplenrae broad and continued to the apex ; underside 

 dark blue or black, legs fulvous, the first joint of the posterior tarsi very long ; 

 all the tibiae mucrouate, the anterior coxal cavities closed. 

 Hab. Loanda (Mus. Rothschild), Gaboon (coll. Jacoby). 



Aethonea (Ootheca) coerulea Allard. 



The very short and insufficient description given by M. Allard of this insect 

 seems to apply to two specimens from Old Calabar which are now before me, 

 but as the nuthor says not a word about the antennae, legs, or state of the 

 anterior coxal cavities, I cannot be positive about the insect, but have little 

 doubt about the right determination on my part, both the type and my specimens 

 having been obtained at the same locality. In any case, the species cannot 

 remain in Ootheca, of which 0. inutabilis is looked upon as the type. Aethonea 

 Baly is a more suitable genus for its reception, and it is probably this genus 

 which M. Allard had in %new, as it contains a sjiecies which was formerly 

 placed in Ootheca {A. serricornis Thoms.). It varies however also from Aethonea 

 in having filiform palpi, differently structured antennae and a longer metatarsus 

 of the posterior legs. I give here a more detailed description of the species : 

 Body elongate, widened posteriorly, metallic blue, head impuuctate, the frontal 

 elevations flattened, eyes very large, palpi filiform, pointed, antennae filiform, 

 black, the basal three joints metallic blue, the second joint short, the third 

 one half longer, the fourth as long as the preceding two joints together, slightly 

 widened, pubescent like the following joints, the last two joints broken off ; 

 thorax transverse, distinctly widened at the middle, nearly three times as broad 

 as long, the sides slightly rounded, the anterior angles slightly thickened and 

 oblique, the posterior margin oblique at each side, broadly rounded and produced 

 at the middle, the surface rather convex, imj)uuctate, metallic blue ; elytra 

 finely and closely punctured, their epipleurae broad at the base, disap])earing 

 below the middle ; tibiae mucronate, the posterior ones with a longer spine, 

 their metatarsus longer than the following three joints together, claws appendiculate, 

 anterior coxal cavities ojien. 



Length 3i lines. 



Hab. Old Calabar (coll. Jacoby), and Cameroons (Mus. Rothschild). 



It is probably better, if similarly structured other species should turn up, to 

 erect another genus for this insect, as the palpi, antennae, etc., are so entirely 

 different from those of Aethonea. 



Aethonea serricornis Thoms. 

 Apparently a common sjiecies at Kuilu and other parts of Africa. Ilaplosonyx 

 fromholtzi Karsch {Berlin. Ent. Zeitsch. 1883) is identical with this si)ecies, and 

 has no affinities with the genus Haplosonyx. 



Mesodonta imitans sj). nov. 

 Testaceous, the base of the head, the antennae and legs more or less black, 

 thorax closely and strongly punctured, elytra finely rugose-punctate, metallic 

 green, with a narrow transverse pale fulvous band. 



