Vol. XXV] ENTOMOLOGICAL NEWS 



439 



second joints of hind tarsi of equal length. Abdomen partly 

 yellow. 



This genus is related to Leptorhethum by the forking of the 

 fourth vein, and the vertex not being excavated ; to Neiirigona 

 still more closely by the bare first antennal joint, the flattened 

 space before the scutelliim and the yellow abdomen. 



Type. — Ps. rutila n. sp. 



Psilopiella rutila n. sp. (Plate XVIII. Fig. 2). 



o . Length 2 mm. Face and front wide, thickh- covered with white 

 pollen ; palpi small, yellow with a few black hairs ; antennae yellow with 

 the rounded third joint brown; arista brown; orbital cilia black above, 

 white below. 



Thorax reddish copper^-, thickly covered with gray pollen; bristles 

 black except the one above the fore coxae, which is yellowish ; pleurae 

 black with white pollen, and with the hind edge a little yellowish. 



Abdomen yellow, shining, with blackish bands on segments 2 to 5. 



Coxae yellow with yellow hairs and bristles ; erect bristle on the 

 hind coxae also yellow ; each tibia with a small black bristle near the 

 knee : tarsi blackish towards their tips. 



Wings grayish hyaline ; fork of fourth vein rather weak and in a 

 straight line with the basal portion. 



Described from one female taken at Bradentown. Florida, 

 in March. 



Medeterus emarginatus n. sp. (Plate XVIII. Fig. 10). 



$ . Length, exclusive of the ovipositor. 5 mm., length of ovipositor 2 

 mm. Face, palpi, proboscis and front black: proboscis shining with 

 several long pale hairs below and a row of short pale hairs along the 

 edge: antennae with the first joint reddish-yellow, second joint black, 

 the third joint brownish-black with an apical arista: orbital cilia black 

 above, pale below : four black bristles above the fore coxae. 



Thorax black, but so thickly covered with brown pollen on the dor- 

 sum as to appear seal-brown with a broad, poorly-defined lateral 

 stripe of darker on each side: acrostichal bristles rather large: on the 

 front of the dorsum inside of the humeri is a space covered with short 

 black bristles : scutellum and flattened space before, pleurae and coxae 

 covered with gray pollen. 



Abdomen black with gray pollen along the sides ; ovipositor with two 

 small yellowish lamellae and about six long slender hairs at tip. 



Coxae and legs black ; extreme tip of middle coxae and of all femora 

 reddish-yellow; fore and middle coxae with black bristles at the tip; 

 hind coxae with one bristle on the outer surface; fore coxae with a 



