1918] Revision of the Genus Sciara 329 



3. Sciara cylindrica n. sp. 



Male: Length, 1.5 mm. Head shiny black; antennas almost black; 

 palpi almost black. Thorax shiny black. Abdomen and hypopygium 

 almost black. Hypopygium; clasper (Fig. 3) as wide at the apex as 

 at the middle, setse longer than the about 8 rather slender spines of 

 the inner margin. Coxae dull luteous, femora, tibiae and tarsi fuscous. 

 Wings (Fig. 84) hyaline, media and cubitus setose; base of Rs slightly 

 distad of the midpoint between the humeral cross vein and the tip of 

 Ri ; Ri ends proximad of the forking of media ; petiole . of cubitus 

 evanescent, apparently less than half the length of the base of media; 

 costa extends about two-thirds the distance between the tips of Rg 

 and Mi; Rs ends distad of .85 the length of the wing, and slightly 

 proximad of the tip of M2. Halteres luteous with dark knob. 



This species may be distinguished from its near relatives, 

 congregata, psittacus, and cylindrica by the form of the clasper 

 and by the petiole of cubitus being shorter than the base of 

 media. 



Described from 1 male, collected May 15-19, 1907, at 

 Felton, St. Cruz Mts., Cal., by J. C. Bradley, Type No. 209. 



4. Sciara congregata Joh. 

 Psyche. Vol. XXI. June 1914, No. 3, pp. 93, 95. 



Male: Length, 2 mm. Head black; antennas fuscous, short (about 

 two-thirds as long as wing from humeral cross vein), joints not twice 

 as long as wide; palpi fuscous. Mesonotum subshining blackish; 

 scutellum, metanotum and pleura subopaque, brownish black. Abdomen 

 subopaque, brownish black. Hypopygium brownish black; no median 

 ventral setiferous lobe; claspers resemble those of jucunda, but apical 

 setae are stouter. Legs brown, the tarsi darker; hind tibia about as long 

 as the petiole of the media of the wing; apical third of tibiae slightly 

 broadened; hind tarsus about .8 as long as the tiba, hind metatarsus 

 slightly over .7 as long as the following 4 joints. Wings (Fig. 35) smoky; 

 veins dark brown, forks of media and apical part of forks of cubitus 

 setose; Ri ends one-third as far proximad of the forking of media as 

 the tip of Rs is distad of this point; basal section of Rs very faint but 

 is evidently distad of the midpoint between the humeral cross vein and 

 the tip of Ri; petiole of cubitus slightly longer than the basal section 

 of M; media petiole is indistinct; costa produced half of the distance 

 between the tips of Rs and Mi; Rg ends distad of .85 the length of the 

 wing and slightly proximad of the tip of M2. Halteres dark. 



Female: Length, 2.5 mm. Like the male in coloring and structure, 

 differing in having slightly shorter antennae, these being less than 

 one-half as long as the wing, with intermediate joints but little longer 

 than wide ; the basal section of Rg and the petiole of media a little more 

 distinct. The lamella; of the ovipositor are only slightly longer than 

 wide. 



Type in Dr. Johannsen's collection, Cornell University. 

 Paratypes in the collection of the Arkansas Exp. Station. 



