84 Psyche [April 



A NEW SPECIES OF LASIOPTERA WITH OBSERVATIONS 

 ON CERTAIN HOMOLOGIES. 



By E. p. Felt. 



Albany, N. Y. 



The gall midge described below was received from William H. 

 Patterson of the Agricultural School, St. Vincent, W. I., under 

 date of November 28, 1910 accompanied by the statement that 

 it was reared from stem galls on purslane, Portulaca oleracece 

 Linn. With this sending there was a Hymenopteron, associated 

 with the gall midge, and presumably parasitic thereupon, which 

 was determined by Mr. Crawford through the courtesy of Dr. 

 L. O. Howard of Washington, D. C, as Lochites auriceps Ashm. 



Lasioptera portulacae sp. nov. 



Male. Length 1.5 mm. Antemiffi short, sparsely haired; 14 segments, the third 

 and fourth slightly fused, the fifth with a length about equal to its diameter, the 

 distal segment slightly produced, narrowly rounded apically. Palpi; the first 

 segment rectangular, second a little longer, narrowly oval, the third as long as the 

 second, more slender, the fourth as long as the third. Mesonotum, scutellum, 

 postscutellum and abdomen a nearly uniform dark brown, the first some- 

 what shining. Wings hyaline, costa dark brown, the discal spot small, 

 whitish, subcosta uniting therewith near the basal third. Halteres reddish 

 brown, fuscous subapically. Legs a variable yellowish-brown, the articu- 

 lations of femora and tibiae and the tarsal segments basally a light 

 yellowish; claws stout, strongly curved, unidentate, the spur large, 

 stout; pulvilli nearly as long as the claws. Genitalia; basal clasp segment long, 

 slender; terminal clasp segment strongly swollen basally; dorsal plate divided, the 

 lobes narrowly rounded, sparsely setose apically; ventral plate rather broad, 

 broadly rounded and sparsely setose apically. Harpes broad, irregular, strongly 

 chitinized distally; style short, stout. 



Female. Length 1.5 mm. Antennae short, sparsely haired, dark brown; 19 seg- 

 ments, the third and fourth slightly fused, the fifth with a length hardly equal its 

 diameter, the distal segment reduced, ovoid. Palpi nearly as in the male, the 

 distal segment a little longer than the third. Color characters nearly as in the 

 opposite sex, the ovipositor with a length nearly equal that of the abdomen, yellow- 

 ish, the terminal lobes with a length three times the width, narrowly rounded 

 apically and thickly setose; acicula apical, acute, and with a length twice that of 

 the terminal lobes. 



Exuviae. Length 2 mm., whitish transparent, slender; antennal cases short, 

 thoracic horns short, slender; -wing cases extending to the third abdominal segment, 

 the leg cases to the fifth, the dorsum of the abdominal segments thickly covered with 

 short, stout spicules. 



