Dec, 1912.] Felt: Studies in Itonidid^. 237 



first and second normal, the fifth sessile, subglobose, with a length slightly 

 greater than its diameter, irregularly and sparsely clothed with short setas and 

 subapically with a whorl of probably four short, stout, fleshy appendages ; 

 terminal segment compound, composed of three closely fused, and with a length 

 about four times its greatest diameter. Palpi : first segment irregularly quad- 

 rate, the second and third subequal, each with a length zY^ times the diameter, 

 the fourth a little longer, more slender. Eyes moderate, black, coarsely granu- 

 late ; ocelli present. Mesonotum dark reddish brown. Scutellum yellowish 

 brown, postscutellum slightly darker. Abdomen mostly dark yellowish brown. 

 Wings hyaline. Halteres yellowish brown. Legs mostly dark yellowish brown ; 

 claws moderately stout, strongly curved, simple, the pulvilli as long as the 

 claws. Ovipositor short, the lobes triarticulate, the distal segment suborbicular. 

 Ventrally, on the 9th segment, there is a pair of submedian, fuscous, pyriform 

 appendages. Type C. 1390. 



One female was taken by Dr. W. L. McAtee on Pkmimers Island, 

 Maryland, March 24, 1907. 



NEPTUNIMYIA, new genus. 



This genus is erected for a unique form representing an inter- 

 mediate stage in development between Lestrem'ia and the highly 

 reduced antennal structures of Microcerata and Tritosyga. It is 

 more closely allied to the former though easily separated therefrom 

 by the normal second antennal segment, the tridentate antennal 

 appendages and the stoutly pectinate claws. The type species is N. 

 tridens n. sp. 

 Neptunimyia tridens, new species. 



Female. — Length 2.75 mm. Antennse hardly extending to the base of the 

 abdomen, sparsely haired, fuscous yellowish, the basal segments yellowish; 9 to 

 1 1 segments, the first obconic, the second short, subglobose, not enlarged, the 

 fifth fusiform, with a length 2j4 times its diameter, a sparse, subbasal whorl of 

 stout setae and subapically a whorl of two or more irregularly tri- or quadri- 

 dentate sensory structures ; terminal segment narrowly conical, with a length 

 three times its diameter and tapering uniformly to an obtuse apex. Palpi quadri- 

 articulate, yellowish white, nearly as long as the antennas, the first segment with 

 a length about three times its diameter, somewhat swollen distally, the following 

 segments, each about l4 longer and more slender than the preceding. Eyes 

 brownish black. Mesonotum dark brown, sparsely haired. Scutellum yellowish 

 brown, postscutellum fuscous yellowish, dark brown posteriorly. Abdomen 

 fuscous yellowish, the incisures and pleurae dull yellowish orange. Ovipositor 

 fuscous yellowish. Wings hyaline, costa dark brown, subcosta uniting there- 

 with at the basal third ; the third vein, broadly and closely united to subcosta at 

 its distal sixth, joins the margin at the distal fourth; the slender fourth vein 



