Malitcoderm Genera Piionoccrus and Idgia. 359 



oontio;iious (narrowly sc|)arated in ? ); anterior tarsal joints 

 1-3 with a comb aloii}^ tlicir inner Cilge. Genital armature: 

 lateral lobes narrowed and sinuously curved towards the 

 apex ; median lobe broad, gradually narrowed, slightly 

 hooked at the ti[) beneath. 



Hdh. SuMATHA, Padang [type], Sungei Kumbang, Siolak 

 Daras, and IJarong Hharu in Korinchi, alt. 3iOO-i500 ft. 

 {Rohhison-Kluss JL.rpedition : iv. 1914j. 



Eleven specimens (5 cJ cJ-, 6 ? ? ) obtained by tlie above- 

 mentioned Sumatra!! expedition are perhaps referable to 

 /. lonf/isahna, Pic, type from Padang. Three only of them 

 ( ? $ ), with a i-elatively shorter apical joint to the antennae, 

 liave the legs wholly testaceous as de-cribed by the author, 

 the others ( c? ? ) having these limbs in part or almost 

 entirely, as well as the head in front aiid the antenme 

 (except at the tip), infuscate or black. The greatly elon- 

 gated eleve!ith antennal joint is one of the characters given 

 to sej)arate /. lonyissima from similarly culoni'cd forms 

 (testaceous, with black head and violaceous apex to elytra) 

 inhabiting the same regions. In the series befoi'c i!ie the 

 apical patch varies in development, from about one-eighth to 

 nearly one-half the elytral length. To judge from Pic's 

 table (lUlO) of the testaceous Javan and Su!iiatran repre- 

 sentatives of the ge!ius, /. lonr/ijjcnnis and /. louyissima may 

 be based !ipon the two sexes of one variable insect. Un- 

 fortui!ately, the ? only of the form with pale legs and 

 antennae, with shorter apical antennal joint, is at present 

 available for exai!iinatiou. 



43. Idyia cyanura, sp. u. 



? . Elongate, widened posteriorly, shining, the el\ tra 

 dull J finely pubescent and sparsely nigro-setose ; testaceous, 

 the head, anteniue (except the basal joints and the tip of 

 11), legs (the bases of the femora and the claws excepted), 

 and a space down the middle of the ventral segments black, 

 the elytra with a larj^c nigro-cyancous patch at the apex. 

 Head small, the labrum strongly transverse, hollowed in the 

 middle in front, appearing subarcuate ; eyes large, well 

 separated ; anteniue slemler, rather short, slightly widened 

 outwards, joints 7-10 decreasing in length, 10 subserrate, 

 11 twice as long as 10, deeply excavate within. I'ruthorax 

 wider than the head, not lunger than broad, feebly sinuate 

 at the sides. Elytra long, rather broad, w idened posteriorly ; 

 densely, rugulosely puneiatc, without granules on tlic ilisc. 

 Length (excl. head) i^|, breadth 3 mm. 



U* 



