40 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



4. Ulomorpha quinque-cellula, new species 



Size large (wing of the S 9 mm.) ; general coloration shiny- 

 reddish yellow ; cell Mi of the wings present. 



Male. — Length, 8-9.2 mm. ; wing, 9-9.2 mm. 



Rostrum and palpi yellowish brown. Antennae rather elongate for this 

 genus of flies, the first segment brown, sparsely gray pruinose ; second 

 scapal and the basal flagellar segments dull brownish yellow, the distal 

 segments dark brown ; flagellar verticils long. Head dark brown, gray 

 pruinose. 



Mesonotal prasscutum shiny reddish yellow without apparent stripes ; re- 

 mainder of the mesonotum dull yellow. Pleura reddish yellow. Halteres 

 pale brownish white, the knobs brown. Legs with the coxae and trochan- 

 ters yellow ; femora pale testaceous brown, the tips narrowly dark brown, 

 especially on the outer face ; tibiae pale testaceous brown, the tips narrowly 

 dark brown ; tarsi dark brown. Wings with a strong yellowish tinge ; 

 stigma indistinct; veins brown; macrotrichiae in all of the cells beyond the 

 cord and more sparsely in the centers of the outer cells to basad of the 

 origin of Rs. Venation: Sc ending at about three-fourths the length of 

 Rs, Sc2 at the tip of the subequal Sci ; Rs long, spurred at origin ; cell Rz 

 sessile; veins R2 and R3 divergent; veins R2, Rs and Rt+i arising almost 

 from a common point; r indistinct; r-m very long; cell Mi present, much 

 longer than its petiole; basal deflection of Cth just before mid-length of 

 cell 1st M2. 



Abdominal tergites yellowish brown, the sternites a little paler. 



Habitat. — California. 



Holotype, $ (No. 722), Huntington Lake, Fresno Co., alti- 

 tude 7000 feet, July 28, 1919 (E. P. Van Duzee). 



Paratopotype, $ . 



5. Ulomorpha nigronitida, new species 



Size rather large (wing of the $ 8 mm.) ; general coloration 

 deep shiny black throughout ; cell Mi of the wings lacking. 



Male. — Length, 7-7.8 mm. ; wing, 8 mm. 



Rostrum and palpi black. Antennae black throughout ; verticils long 

 and delicate. Head black, very sparsely gray pruinose. 



Thorax shiny deep black, including the pleura. Halteres with the stem 

 pale brown, the knobs dark brownish black. Legs with the coxae dark 

 brownish black, the hind coxae paler ; trochanters dull yellowish ; remainder 

 of the legs black, the bases of the femora dull yellow, this coloration 

 narrowest on the fore legs, broadest on the hind legs. Wings with a pale 

 gray tinge, the bases more yellowish ; the abortive anal vein behind vein Cu, 

 yellowish; the macrotrichiae in the cells of the wing basad of the level of 

 the origin of Rs more sparse than in U. pilosella or U. sicrricola, but very 

 much heavier than in U . vandnzcci. Venation ; Sc ending at about four- 

 fifths the length of the long sector, Sc2 at the tip of Sci, Sc2 being about 

 two-thirds as long as Sci ; Rs long, gently arcuated at origin ; cell Ri 

 sessile or very short-petiolate ; vein R2 diverging from vein Rs and almost 

 parallel with Ri so that cell R2 is nearly twice as wide as cell R% at the 



