1917] New MycetophilidcB from California 315 



crossing the scutellum. Pleura; dark brown, setse brown, hairs yellow; 

 metanotum brown. Hypopygium small, yellow (Plate XXV, B). Coxag 

 and legs yellow ; brown spot on posterior lateral base of middle and hind 

 coxae. Tips of middle and hind femora brown. Middle tibias with three 

 setce on the flexor surface and two ranges of setse on the extensor surface. 

 Wing yellowish hyaline, with central brown spot and preapical fascia 

 distinct across Mg (Plate XXV, Fig. lb). Halteres very pale. 



Female differs in having a wing cloud in anal cell, close to Cu2. 



Reared from Polyporus sidphiireits. Stanford University, 

 October. 



Type No. 569-2-1, L. S. J. U., Entomological Museum. 



III. Mycetophila alata n. sp. 



Male: Length 4 mm. Antennae brown, palpi brown. Thorax brown; 

 three dark brown, broad vittae on the mesonotum. Pleurae brownish ; 

 metanotum brown; setae brown hairs pale. Abdomen dark brown; 

 hypopygium small, yellow (Plate XXVI). Coxa and legs yellow. 

 Tips of middle and hind femora brown. Middle tibiae with three setae 

 on flexor surface, and two ranges of setae on extensor, surface. Wings 

 yellowish h valine, with central brown spot and preapical fascia arising 

 at tip of Ri" (Plate XXVI, Fig. 2a). Halteres pale. 



Female: Differs in having scape and base of fiagellum yellow, and 

 wing cloud in anal cell. 



Reared from Polyporus sulphureus. Stanford TJniversity, 

 December. 



Type No. 569-6-1, L. S. J. U., Entomological Museum. 



IV. Allodia dentica n. sp. 



Male: Length 5 mm. Lateral ocelli contiguous to eye margin; 

 middle ocellus smaller and in a direct line with the two lateral ones. 

 Vertex brown; face, palpi and scape yellow; fiagellum brownish. 

 Antenna not as long as head and thorax together. Thorax yellowish; 

 mesonotum with three brown stripes, the median one broadening 

 anteriorly and extending forward to anterior margin of mesonotum. 

 Scutellum yellowish with four large setse near distal margin. Metanotum 

 brown with narrow light median line. The pleurae yellow; setse dark 

 brown; hairs pale. Abdomen yellowish; venters yellow, dorsum 

 brownish, with 5th and ()th segments widely brown. Coxse and legs 

 yellow; tibial spurs brownish. Fore metatarsus shorter than the tibia 

 and longer than the fore coxa. Five setae above the fore coxa on the 

 humerus ; mesosternum without setae ; four setse on mesosternimi above 

 hind coxae. Second tarsal joint with a peculiar cupped and comb-like 

 arrangement, with four sharp spines laterad and basal to the comb 

 (Plate XXVII, Figs. 5, 5a). Wings yellowish hyaline; subcosta ends in 

 R, ; cubitus forks slightly proximad of proximal end of cross-vein (t'late 

 XXVII, Fig. 3a). Hypopygium as shown on Plate XXVII, lower 

 forceps terminating in broad chitinized process which terminates in a row 

 of blunt teeth (Plate XXVII, Fig. 3). Halteres yellow. 



