Mahicoderm Genera Prionoccnis and Mgia. ;U5 



There is a pair of tliis species in the British Museum and 

 a male iu the Hope collection at Oxford. A very elon<^ate, 

 dull, grcyish-ji^reen insect, with the anterior and basal mar- 

 gins of the prothorax, the evtreme bases of the femora, the 

 alxlomen, and the under surface iu <;reat part, testaceous ; 

 the antennse slender, liiiform ; the [)rothorax ruj;uh)se, the 

 dark patch on the disc sometimes divided down the middle ; 

 the elytra unusually long and densely, rugulosely punctate ; 

 the legs slender in both sexes, 



22. Idgia cyanocephala, sp. n. 



Elongate, narrow, subparallel, moderately shining, finely 

 cinereo-pubescent, and sparsely nigro-setose ; cyaneous, the 

 elytra and under surface greenish, the prothorax and basal 

 joints of the palpi testaceous, the antennoe piceous, testaceous 

 at the base and tip. Head narrow, moderately produced 

 anteriorly, tlie labrum transverse; eyes somewhat distant 

 in both sexes ; anteun^e slender, subtiliform, joints 3 and 

 •4 about etpial in length, 11 much longer than 10, concave 

 within. Prothorax scarcely wider than the head, sinuate 

 at the sides posteiiorly, about as long as broad. Elytra 

 elongate, sub[)arallel, at the middle twice as wide as the 

 prothorax, rounded at the tip, flattened on the disc; densely, 

 rugulosely punctate, with four rows of rather prominent 

 granules, the margins crcuuiate. Legs slender. 



cJ . Anterior tarsal joints 1-3 with a narrow comb along 

 their inner edge ; posterior femora slightly thickened. Geni- 

 tal armature (PI. XI. fig. 19) : lateral lobes moderately long, 

 feebly sinuate, narrowed towards apex ; median lobe stout, 

 sinuate, pointed. 



Length (exel. head) 7\-S\, breadth 2^ mm. ( (^ ? .) 



Hub. Malacca, Perak {Doherly). 



One male and two females. Smaller than the Indian 

 /. viridipennis, Pic, the head narrower, the antennte slender 

 and with the fourth joint as long as the third, the eyes 

 larger, the elytra flattened on the disc, the fourth row of 

 granules forming a distinct ridge. Compared with /, cten/- 

 leirentris, which also occurs at Perak, the nictaliic-blue 

 head, elytra, and legs and the slightly thickened posterior 

 femora of the c? will serve to distmguish /. cyanocephala. 



23. Idy'ia rouyeri. 

 Idgia rouyeri, Pic, L'Echange, xxii. p. 43 (1900). 



Elongate, narrow ((J), broader ( ? ), shining, thitkly 



