1922] NATURAL SCIENCES OF PHILADELPHIA 261 



Xiphidiopsis aglaia new species. Plate XV, figure 11; plate XX, figures 8, 9 and 10. 



Agreeing closely with the male of X. gemmicula, here described, 

 in general structure and color pattern, the present male differs in 

 certain color features, but signally in the remarkable and distinct- 

 ive genitalic specialization. 



Type: cf; Island of Basilan, Zamboanga Province, Philippine 

 Islands. (From C. F. Baker.) [Hebard Collection, Type no. 828.] 



Agr ;es closely with gemmicula in all structural features except 

 the following. Vertex with a delicate, linear, medio-longitudinal 

 sulcus. Pronotum with metazona slightly shorter than prozona. 

 Ultimate tergite and supra-anal plate similar, except that the latter 

 is more slender, with median shaft decidedly more elongate, this 

 portion with dorsal surface channeled, the distal portion similar 

 but less heavy, so that the apex has its median portion narrow, 

 vertical but convex, with the lateral ridge reduced to a small, 

 flattened lobe dorsad on each side, with outline strongly convex, 

 these directed dorso-laterad. Cercus very large and intricately 

 specialized., proximal portion heavy, short, produced internally 

 in a heavy sub-denticulate plate; from this portion a much more 

 slender shaft is directed caudad, developing distad as follows. 

 Dorsad produced in a stout finger which is widest just before its 

 rounded apex, ventrad produced as a very large and heavy plate, 

 directed mesad with ventral surface deeply concave, forming an 

 auriform process (so that these portions of the cerci overlap 

 strongly). Above the subgenital plate the yoke of the ultimate 

 tergite is produced, bearing two slender processes directed dorsad, 

 which are concealed by the proximo-internal plates of the cerci. 

 Subgenital plate very similar to that of gemmicula, except that it 

 is somewhat shorter and the styles are not over three times as long 

 as their basal width. 



General coloration (apparently discolored) buffy brown, the sides 

 of the thorax yellow and probably striking in life. Antennae as 

 in gemmicula. Vertex tipped with blackish brown, remaining por- 

 tions and a medio-longitudinal suffusion on occiput and pro- 

 notum of zinc orange, this, toward the caudal margin of the pro- 

 notum, changing to a small, elongate, triangular patch of buffy, 

 bordered by a suffusion of blackish brown. This conspicuous 

 marking, though of the same general character as in gemmicula, 

 is seen to be differently proportioned. Tegmina very similar to 

 those of gemmicula, but more embrowned, with a regular series of 

 eleven, instead of ten, similar spots and one or two similar spots 

 distad between the median vein and its branch. Limbs as in 

 gemmicula except that the penultimate joint of the tarsi and the 

 apices of the caudal tibiae are more heavily embrowned. 



Length of body 13, length of pronotum 3.7, greatest width of 

 pronotum 1.7, length of pronotal lateral lobe 2.8, depth of pronotal 

 lateral lobe 1.4, length of tegmen 15.9, width of tegmen 1.9, 

 length of cephalic femur 4, length of caudal femur 9.3 mm. 



The type is unique. 



