X, D, 6 Baker: Studies in Philippine Jassoidea, IV 341 



times the length, the length a little less than two times that 

 of the vertex, surface uniformly finely shagreened. Scutellum 

 as long as pronotum and about one fifth of the vertex together; 

 surface coarsely, irregularly shagreened on basal field; trans- 

 verse impressed line obtuse-angularly bent, open at apex, lateral 

 limbs not arcuate. Hind margin of anal segment of female 

 subtruncate, in male medially, narrowly, acutely produced. 

 Pygofers twisted, apical half uniformly narrowed. 



Luzon, Mount Maquiling and Mount Banahao {coll. Baker). 



Genus IDIOCERINUS novum 



The two species here described under the new genus Idioce- 

 rinus present a form of front not noted by me in any other 

 Philippine idiocerine insects. The clypeus is shorter for its 

 width than is to be found elsewhere. Otherwise it is much 

 more like Idioscopus and Pedioscopus than like typical Idioce- 

 rus. It includes the most delicately beautiful idiocerine insects 

 in the Philippine fauna. Idiocerus stali of Fieber is apparently 

 to be referred here. 



Type, Idiocerinus melichari sp. nov. 



Synopsis of the Philippine species of Idiocerinus. 



a'. Head and pronotum shining ochraceous, the latter and scutellum tinted 

 with reddish brown; tegmina smoky, the veins concolorous; hind 

 margin of anal segment of female truncate, the side plates not 



carinate melichari sp. nov. 



a'. Head and pronotum shining pearly; tegmina subhyaline, the veins 

 basally orange; hind margin of' anal segment of female medially 

 produced and emarginate, the side plates strongly carinate. 



nacreatus sp. nov. 

 Idiocerinus melichari sp. nov. 



Length, 4 mm.; width of head, 1.3 mm. Ochraceous, tinted 

 with reddish brown on pronotum and scutellum. Tegmina semi- 

 transparent; corium very slightly tinted with pale brownish, 

 only the inner veins distinct, the median vein broadly blackened 

 throughout its length; clavus opaque golden brown; punctures 

 obsolete. 



Vertex, and face to near ocelli, sharply and strongly cross 

 striate, the strise on face strikingly oblique (a rare condition 

 in the Idiocerini) ; length of vertex into width between eyes 

 about five times, the length at middle very slightly greater than 

 that at eyes. Face about as broad as long; distance between 

 ocelli once and a half the distance between ocelli and eyes and 

 about once and a half the width of clypeus at base; clypeus 

 very short, broadened toward tip, where it is slightly emargi- 



