338 The Philippine Journal of Science 1915 



remainder of this area — a broad band along claval suture — ivory- 

 white. This form may be designated var. bicolorata nov. 



This species must be nearly related to Idiocerus unimaculatus 

 Melichar, which is probably congeneric with it. 



Genus IDIOSCOPUS novum 



As a generic group Idioscopus is as distinct as Busonia, 

 Chunra, Pedioscopus, etc., and I am surprised that Distant did 

 not separate it. The habitus is not at all that of typical 

 Idiocerus, the head being larger, narrower, and longer as seen 

 from above, usually distinctly longer at middle than at eyes, 

 and long in proportion to width between eyes. The first apical 

 and first subapical cells are normally confluent. 



Type, Idiocerus clypealis Leth. as here described. 



Synopsis of the Philippine species of Idioscopus. 



a'. Length of pronotum about three times that of vertex; width of vertex 

 between eyes more than four times the length; two black spots on 

 scutellum anteriorly, two spots on anterior margin of pronotum, 

 and two on anterior margin of head; clypeus white apically in the 



female palawanensis sp. nov. 



a^. Length of pronotum little more or less than two times that of vertex; 

 width of vertex between eyes less than three times the length; clypeus 

 all black in female. 

 V. Vertex and pronotum in male without spots; scutellum with two black 



spots anteriorly clypealis Leth. 



b^. Vertex in male with two black spots, pronotum with two spots behind 

 anterior margin; scutellum basally with a single, large, median 

 black spot tagalicus sp. nov. 



Idioscopus palawanensis sp. nov. 



Length, 4.25 mm. ; width of head, 1.5 mm. Ochraceous, olive- 

 tinted on vertex and pronotum; basal field of scutellum reddish 

 brown; large basal lunulas on scutellum, small pronotal lunulse 

 back of eyes, two spots on anterior margin of head, small dots 

 inclosing ocelli, basal two thirds of clypeus, spot on mesopleurse, 

 and the ovipositor black; antennal scrobes darkened; tegmina 

 golden brown, paler apically, the region of outer apical cell 

 clearer ; costa broadly, alternately yellow and brown to the outer 

 apical cell. 



Vertex, and face to just below upper black spots, finely, trans- 

 versely striate, remainder shagreened; head wider than prono- 

 tum ; length of vertex into width between eyes four and one-third 

 times ; length at middle nearly the same as at eyes. Face slightly 

 longer than broad ; distance between ocelli two and a half times 

 the distance between ocelli and eyes and twice the width of 



