122 Journal New York Entomological Society. [Vol. xxiv. 



The types are in the collection of the United States National 

 Museum. 



The related species of this group may be separated by the key 

 that is appended to the following species. 



Limnophila barberi new species. 



Black, the interspaces of the mesonotal prjescutum with a gray bloom ; 

 fore femora brown except at the extreme base. 



Male. — Length, 6.4 mm. ; wing, 8.3 mm. 



Female. — Length, 7.6 mm.; wing, 8.1 mm. 



Rostrum very short as in this group of the genus, dark brownish black, 

 the palpi dark brown. Antennae short, dark brown, the apex of the first seg- 

 ment a little brighter. Head dark brown with a sparse grayish bloom. 



Mesonotal praescutum black with a sparse gray bloom, the usual thoracic 

 stripes devoid of bloom, very shiny and very broad ; scutum similar, the 

 median area broadly gray pruinose ; scutellum and postnotum dull brown. 

 Pleura dark brown with a light gray bloom, the dorsopleural membranes 

 indistinctly dull yellow. Halteres pale, the knob very little darker. Legs 

 with the coxae dull yellow, a little brownish on the basal half of the outer 

 face ; legs slender, the femora yellow with the apices brown, on the fore legs 

 including all except the extreme base of the segment, on the hind legs includ- 

 ing a little more than the apical half ; tibiae and tarsi dark brown. Wings 

 sub-hyaline, crossveins and deflections of veins narrowly seamed with brown, 

 the costal cell light brown, the stigma indistinct, the veins dark brown. 

 Venation (see plate i, fig. 6), as in the inunda group, the radial sector elon- 

 gated, almost straight, R2+3 about equal to the deflection of R^^s ', basal deflec- 

 tion of Cui just before tne middle of cell ist Jl/o. 



Abdominal tergites dark brownish black, the sternites more reddish ; 

 male hypopygium more reddish ; the valves of the ovipositor of the female 

 chestnut. 



Habitat. — Western United States. 



Holotype, J*, Eureka, California; May 24, 1903; H. S. Barber. 



Allotype, 2> topotypic, in coitu with the type. 



The types are in the collection of the United States National 

 Museum. 



The species is dedicated to the collector, Mr. H. S. Barber, of 

 Washington. 



The species that are allied to, or resemble, Limnophila munda O. S. 

 may be separated by the following key: 



I. Mesonotal prtescutum entirely shiny black 2 



Mesonotal praescutum with a gray bloom, at least on the sides of the 

 sclerite 3 



