Malacoderm Genera Prionocerus and Idgia. 335 
Antenne long, rather slender, subfiliform. Eyes extremely 
large, almost contiguous. Labrum large, angularly dilated, 
transverse. Apical joint of maxillary palpi elongate, cultri- 
form, that of the labial palpi securiform. Prothorax nar- 
rower than- the head, very uneven, rugulosely punctate. 
Elytra elongate, rounded at the tip; densely, rugulosely 
punctate, the seriately-arranged sete each preceded by a 
minute smooth tubercle. Sixth ventral segment sulcate 
down the middle. Anterior tarsal joints 1-3 with a narrow 
black comb along their inner edge, 4 small. Genital 
armature (PI. XI. fig. 6): lateral lobes long, broad; median 
lobe abruptly narrowed towards apex, the apical portion long 
and slender, sharply hooked at the tip beneath. 
Length (excl. head) 83-9, breadth 8-3} mm. 
Hab. Asyssinta (Mus. Brit.). 
Three males, received in 1876. Closely related to 
I. apicalis, Gerst., and separable therefrom by the large 
black apical patch on the elytra, the broadly infuscate disc 
of the prothorax, the blackish under surface and legs, the 
more elongate apical joimt of the maxillary palpi, and the 
different genital armature. 
7. Idgia cyanea. 
Idgia cyanea, Pic, L’Echange, xxii. p. 43 (1906). 
3. Tarsi formed very much as in J, dimidiata, joints 
1-8 of anterior pair with a similar comb on their inner 
edge, 1 and 2 subequal in length, 4 small, shorter than in ? ; 
tibial spurs small, as in ¢. Genital armature (Pl. XI. 
fig. 7) : lateral lobes narrower than in J. dimidiata ; median 
lobe sinuate, and drawn out into a long, narrow point, which 
is abruptly curved downward and rather blunt at tip. 
Hab. Ucanna, 8.K. shore of Lake Kioga and between 
that place and Kakindu in W. Busoga, alt. 3400-8500 ft. 
(S. A. Neave) ; 8. Nigeria, Oyo Yoruba. 
Thirteen examples from Uganda, including five males, 
are referred to this species, the type of which was from 
Oyo Yoruba. Very like J. dimidiata, var. tripartita, wholly 
black or bluish black, with the exception‘of the rufous tarsal 
claws and the uniformly nigro-cyaneous elytra, the antenne 
a little less widened. 
8. LIdgia fulvicollis. 
Ldgia fulvicollis, Reiche-in Ferret and Galinier’s Voy. Abyssin., Ins, 
p. 286, t. 17. figs. 5,5 a-e (1849). (¢@.) 
&. Eyes larger, more convex, and more narrowly separated 
