28 PROCEEDINGS OF THE NATIONAL, MUSEUM vol.69 



metallic greenish; base and apex of scape and apex of pedicel 

 yellowish, the antennae otherwise as in califorrdca; coxae and 

 femora blackish, the hind femora with metallic luster, all tro- 

 chanters yellowish, the front tibiae and tarsi pale brown, apex of 

 front and middle femora, the middle tibiae excepting a broad fus- 

 cous ring at the middle, base very narrowly and apex of hind tibiae, 

 and the middle and hind tarsi pale yellow, with only the tip of 

 pulvillus of the apical joint of the tarsi dark; wings hyaline, the 

 veins brownish. 



Length of body (0.92 to) 1.30; length of head, 0.459; width of 

 head, 0.532; width of frontovertex, 0.247; length of antenna, 0.803; 

 width of mesoscutum, 0.523; length of fore wing, 1.079; width of 

 fore wing, 0.518; length of ovipositor sheaths, 0.047 mm. 



Male, — Similar to the male of calif ornica^ but differing in colora- 

 tion and sculpture in the same way that the female does; antennae 

 similar, the scape a little slenderer and more fusiform or widest 

 near the middle, the first funicle joint longest, over twice as long 

 as wide, third to fifth joints about twice as long as wide, the 

 second and sixth joints a little shorter, the sixth a little more than 

 half longer again than wide, club one-jointed, oval, pointed at apex, 

 about as long as the last two and one-half preceding joints com- 

 bined, the arrangement of hairs on the flagellum about the same. 



Length of body, 0.91; length of head, 0.342; width of head, 

 0.390; width of frontovertex, 0.189; length of antenna, 0.685; width 

 of mesoscutum, 0.368; length of fore wing, 0.833; width of fore 

 wing, 0.404 mm. 



Described from two females and one male (holotype female, 

 allotype, and paratype) reared April 13-14, 1922, from Saissetia 

 nigra (Nietner) at the experiment station, St. Croix, Virgin Islands, 

 West Indies (C. E. Wilson). 



Type.—C2Lt. No. 28146, U.S.N.M. 



MAYRIDIA AMERICANA, new species 



Plate 1, figs. 9 and 13 ; plate 2, figs. 21 and 21a 



Closely allied to M. hifasciatella (Mayr), but differs in having 

 the hyaline crossband of wings composed of two opposed triangu- 

 lar spots, the frontovertex of female twice as long as wide, the 

 antennae of the male very much longer, etc. 



Female. — Head thick frontooccipitally, the face inflexed; as seen 

 from above the occipital margin is broadly and slightly arcuately 

 emarginate, the sides obliquely rounded and somewhat converging 

 toward the front, the head being widest close to the occipital plane, 

 the frontal margin nearly transverse medially ; as seen from in front 

 a little wider than long, full rounded above, the dorsal surface of 



