360 The Philippine Journal of Science i 923 



nearer to median line than to ocellus, the subocellar carina 

 sharply bordering anterior margin of crown, which is subtrun- 

 cate; basal carina of vertex very thin and sharp; concavities of 

 vertex deep, the anterior margin strongly raised, the median 

 carina subobsolete, the surfaces minutely roughened and sub- 

 divided by low indistinct intermediate ridges, which parallel 

 the lateral and basal carina?; ocellus distant from eye about 

 twice its diameter. Length of vertex less than half width 

 between eyes, but greater than lateral margin of pronotum, as 

 in S. carinata. Pronotum (Plate 1, fig. 7, a) three times length 

 of vertex, the anterolateral margin about five times into the 

 width; marginal carina (in lateral view) straight, the pleura 

 with an irregular fold near posterior margin and a vertical 

 median series of large elongate pits; thimble pits of pronotum 

 very large, somewhat irregular, the intersections narrow but 

 low and smooth; transverse depression nearer to foremargin 

 than m other species, the median carina on anterior half of pro- 

 notum sharp and strong but depressed where it passes the 

 transverse depression. Margin of basal cell of clavus somewhat 

 longer on the commissure than on the anal margin. 



Luzon, Benguet Province, Pauai (Haight's Place), altitude, 

 2,400 meters {Baker) . This species presents the only case in the 

 family known to me of strongly marked sexual dimorphism. 

 It may possess relationships with S. sumatrana Schmidt, which 

 may exhibit a similar dimorphism, but this cannot be known 

 until the structural characters of S. sumatrana are described. 

 Genus PEETA Distant 



Synopsis of species. 

 a\ Head and thorax long; thimble pitting of pronotum weak but distinct; 

 tegmmal appendix well formed and reaching apex; subapical cell 

 m,t Q<3 lon S as width of succeeding apical cell 



, „ , P. gratioL 



a. Head and thorax short; thimble pitting of pronotum obsolete, the 

 surface smooth; tegminal appendix reduced, reaching about halfway 

 irom apex of clavus to apex of tegmina; subapical cell much longer 



than width of succeeding apical cell P. luzonensis sp. nov. 



Preta gratiosa Melichar. Plate 1, fig. 8. 



Melichar, Homop. Ceylon (1903) 160 (Signoretia) . 

 Pale ochraceous (virescent in life) ; fore and middle tibiae, 

 apically, and tarsi darker. Corium and membrane subhyaline, 

 the apical veins a little infuscated, clavus opaque, whitish. 



