206 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



gently dorsad to its acute apex, the margins serrulate in distal 

 half. Subgenital plate delicate, triangular, with apex bluntly 

 bilobate. Ventro-external margins of median and caudal femora 

 lamellate. Ventral femoral margins armed with the following 

 number of procumbent spinulae. Cephalic internal 10 and 11, 

 cephalic external 11 to 13, median internal 11 and 11, median 

 external 15 to 18, caudal internal 16 to 17, caudal external 25 to 30. 

 Caudal tibiae with four margins supplied with very small spines, 

 the dorso-external margin weakly lamellate. 



General coloration immaculate light greenish yellow, apparently 

 faded to yellowish on body, probably pale green in life. Antennae 

 delicately and finely annulate distad. 



Length of body 27 and 25, length of pronotum 4.3 and 4.3, caudal 

 width of pronotum 3 and 3, length of tegmen 37.8 and 36.4, greatest 

 width of tegmen 11.9 and 11.7, length of cephalic femur 5.9 and 

 5.9, length of caudal femur 12.3 and 13.1, length of ovipositor 

 10.3 and 11.5 mm. 



In addition to the type, a single paratypic female, from Los Bafios, 

 Luzon, Philippine Islands, is before us. 



Morsimus albomarginatus new species. Plate XV, figure 5; plate XVII, figures 8, 9, 

 10 and 11. 



Apparently nearest M. inversus (Brunner), the present insect 

 differs; in proportions, in the non-carinate vertex, the immaculate 

 head and pronotum, weak proximal curvature of the branch of the 

 median vein of the tegmina, which forms an acute angle with that 

 vein, anal field of tegmina, which lacks a spurious longitudinal vein 

 and proportionately much smaller ovipositor. 



Type: 9 ; Labuan, British North Borneo. [Hebard Collection, 

 Type no. 816. 



Size large for the genus, form medium, structure very delicate. 

 Head smooth; vertex acute with dorsal surface faintly convex 

 proximad, thence weakly concave to near apex. Distal margin 

 at first antennal joint with a sharp tubercle ventrad and a smaller 

 rounded tubercle dorsad. Pronotum moderately well supplied 

 with very minute tubercles ; disk rounding evenly into lateral lobes, 

 with a very weakly indicated rounded medio-longitudinal carina 

 and two distinct transverse sulci, flattened in caudal portion; 

 lateral lobes with ventro-cephalic marginal portion thickened, 

 tuberculate and broadly convex to slightly beyond median portion 

 on ventral margin, ventro-caudal angle strongly convex at slightly 

 more than ninety degrees. Tegmina and wings fully developed. 

 Tegmina with costal margin broadly, though more strongly than 

 usual, convex to the sharply rounded apex at sutural margin, 

 which margin is straight except in the weakly convex proximal 

 portion; veinlets of marginal and scapular fields pale, forking distad, 

 oblique; discoidal and median veins scarcely diverging in distal 



