1868.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. G47 



Apheereta californica n. sp. 



Female. — Length, 1£ to l| mm ; ovipositor, | mm . In the number of joints 

 in tbe antennae and in color this species is an exact counterpart of the 

 preceding - , but it is proportionately smaller; there is a distinct longi- 

 tudinal grooved line on vertex, extending from ocelli to occiput, and 

 'the 2d transverse cubital nervure of anterior wing is much shorter, the 

 2d submarginal cell being thereby much more narrowed at apex than in 

 A. muscce. • 



Habitat. — Los Angeles County, California, 



Described from six specimens, labeled No. 130°, reared in September, 

 188C, by Mr. Albert Koebele, from a dipterous larva in dead and injured 

 roots of Typha latifolia. 



Aphaereta oscinidis n. sp. 



Female. — Length, 2 mm ; ovipositor, + mm . This species could easily be 

 confounded with both of the above, agreeing with them in colorational 

 details, except as follows: The veins of the wings are dark brown ; the 

 apical margins of 3d and 4th abdominal segments are piceous; it has 

 a groove extending from ocelli to occiput as in A. californica ; but what 

 will readily separate the species are the antennae; these are 23-jointed. 



Habitat— Washington, D. C. 



Described from a single specimen, labeled 4310°, reared July 7, 1888, 

 from a dipterous miner, Oscinis sp., mining the leaves of Plantago major. 



■ ADELURA Forster. 



Adelura subcompressa n. sp. 



Male and female.— Length, 1| to lf mm ; ovipositor, about f mm . Black, 

 smooth, polished; antenna?, brown; legs, flavo-testaceous ; abdomen, 

 piceous; the 1st segment at base and sutures of ventral segments 

 paler. The antennae in the male are 1G jointed, in the female 15 jointed ; 

 the 1st joint of the rlagellum is a little longer than the 2d; the 2d and 

 following joints long-mouiliform ; thorax ovoid, smooth, polished, with- 

 out grooves; metathorax delicately areolated ; abdomen as long as the 

 head and thorax together, subcompressed; the 1st segment delicately 

 aciculated. Wings, hyaline, iridescent; veins, brown; the 2d discoidal 

 cell is much contracted ; the recurrent nervure joins the 2d submarginal 

 cell at its basal angle, and is almost interstitial with the 1st transverse 

 cubital nervure; the 2d submarginal cell is very long and narrow, more 

 than twice the length of the 1st; while the 1st branch of the radius is 

 not half the length of the oblique 1st transverse cubital. 



Habitat— Los Angeles County, California. 



Described from one male and one female, received from Mr. Albert 

 Koebele, labeled " Observed ovipositing in dipterous larvae in rotten 

 fungus." 

 Adelura dimidiata n. sp. 



Male.— Length, l± mm . Black, smooth, polished : flagellam of antennae, 

 brown; the basal joints of antennae, palpi, legs, tip of metathorax, more 



