new species of African Eumolpidce and Halticidce. 101 



the disc rather convex, smooth, with a few fine punctures, the anterior 

 angles very shghtly produced ; scutelkim flavous, impunctate ; elytra 

 closely and distinctly but not very strongly punctured, the anterior portion 

 as far as the middle metallic blue, the rest fulvous or obscure fiavous, their 

 epipleurae metallic dark blue ; tibiae entire, claw-joint strongly inflated. 



At first sight this species seems almost identical with the only 

 other known one from Old Calabar, P. Dohrni, Har., but the 

 constant differences shown in the four specimens before me seem 

 to prove them to represent another species ; these differences are 

 the following : the thorax, instead of being of uneven surface 

 and rugosely punctate, is smooth and nearly impunctate in P. 

 Haroldi ; and instead of the fulvous apex of the elytra, as in the 

 last-named species, this colour occupies the entire posterior half. 

 I possess both sexes ; in one of the specimens, however, the 

 antennse are entirely fulvous, and the similarly-coloured apex of 

 the elytra extends only to a third upwards, and its upper edge 

 being obliquely concave, not straight as in the other specimens ; 

 in the absence of other differences, I must look upon this speci- 

 men as a variety. 



Gabonia, n. gen. 



Oblong-ovate ; eyes large ; antennae with subtriangular joints, the 

 second aud third short ; thorax transverse, the posterior margin rounded ; 

 elytra irregularly punctiu-ed, their epipleurse very broad ; tibite sulcate, the 

 anterior ones unarmed, the posterior ones with a long spine ; metatarsus of 

 the posterior legs as long as the following two joints together ; claws 

 appendiculate ; prosternum very narrow, the anterior coxal cavities closed. 



This genus, which will enter the group of Arsipodince of 

 Chapuis' arrangement, resembles, in general shape and appear- 

 ance, the South American genus Oxygona, but the thorax in the 

 latter is still much more transverse, and the antennae are of 

 different construction ; the long and slender spine at the pos- 

 terior tibise in the present insect is another characteristic of the 

 genus. 



Gabonia unicostata, n. sp. 



Fulvous ; the base of the head black ; the antennae, thorax, and legs 

 flavous ; thorax impunctate ; elytra very minutely punctured, fulvous, with 

 a strongly raised transverse ridge near the apex. Length, 2|- lines. 



Head with a few very fine punctures at the vertex, the latter black, the 

 lower portion flavous, frontal tubercles transversely subquadrate, carina 

 acute; labrum piceous ; eyes very large; antennae extending to about half 

 the length of the elytra, fulvous, the second and third joints short, equal, 

 the intermediate joints slightly triangularly widened ; thorax twice as broad 

 as long, the sides slightly rounded, the anterior angles somewhat broadly 

 produced, the posterior margin rounded, the surface with a few very minute 

 punctures, flavous ; scutellum fulvous ; elytra rather convex, extremely 

 closely and finely piinctured, fulvous ; a highly-raised transverse ridge is 

 placed at a little distance from the apex, but does not extend to the sides, 

 the apical portion behind the ridge is strongly deflexed ; elytral epipleurse 

 very broad, concave, extending to the apex ; posterior femora strongly incras- 

 sate, their tibiae longitudinally sulcate, with a long apical spine. 



SUPPLEMENT, ENTOM. — FEB., 1893. P 



