64 Mr. G. J. Arrow on Melolonthlne Coleoptera. 



Both generic and specific names o£ Blackburu-'s Neolepidiota 

 ohscura are redundant, the insect b( ing a common Indian 

 species, Holotrichia serrata, F., of which an ohl specimen in 

 bad condition and of unknown origin unfortunately fell into 

 Blackburn's hands. It is now in the British Museuni. 



I believe Lepidiota boviUi, Blackb., to be identical with 

 L. rothei, Blackb. In spite of a careful comparison of his 

 types, I am quite unable to detect the differences mentioned 

 by him. 



Nematoserica, gen. nov. 



Corpus nonnihil elongatutn. Mesosternum baud productura, sat 

 latum. Pedes graciles, tibia antica lata, bideutata, postica modice 

 angusta, fortiter spinosa, tarsorum posticorura articulo priino 

 quam secundum duplo longiori. Ungues profunde fissi, parte 

 interna brevi et lata. Antennte lO-articulatye, clava {S) quadri- 

 articulata, longissima, lamellis a^qualibus ; ( $ ) tnarticulata. 

 Clypeus .vix angustatus, margine antico reflexo, subtiliter 

 Biuuato, superficie anteriori liaud lato. Oculi baud magni, 

 remoti. Prothoracislatera postice sinuati, anguhs posticis acutis. 

 Elytrorum uiargiues postici arcuati, ad suturam depress!. 



Nemntoserica ccerulea, sp. n. 



Cserulea vel viridi-coerulea, sericea, clypeo tibiis tarsisque nitidis, 

 antennis nigris ; modice elongata, convexa, capita, corpore subtus 

 pygidioque pallide setosis, elytrorum lateribus fortiter uigro- 

 setosis, clypeo parce punctato, margine valde I'eflexo, antice snb- 

 tiliter sinuato ; pronoto parcissime punctato, lateribus bisinuatis, 

 angulis posticis acutis, paulo productis, basi utrinque late 

 impresso ; elytris fortiter sulcatis, sulcis sat vage puuctatis, 

 apicibus separatim arcuatis, parte postica ad suturam depressa, 

 corpore subtus opaco, grosse setoso ; pygidio sat fortiter punctato. 



Long. 5-5'5 mm. ; lat. max. 3-3'5 mm. 



Hob. Borneo (Sarawak) : Puak [G. E. Brijant, April, 

 May). 



Type in the British Museum. 



This beautiful little insect is chiefly remarkable for the 

 length of the 4-jointed antennal club of the n)ale, which is 

 relatively longer than in any other species of Sericinse known 

 to me. The tour lamellae are of equal length — at least five 

 times as long as the foot-stalk — and little shorter than the 

 elytra. The bright blue or gieenish-biue colour is also, so 

 far as I know, unique. The u|)per surface is silky and sub- 

 opaque, with the clypeus alone shining, the margin of the 



