1923 ] 
North American Dixidce 
55 
Legs yellowish brown, becoming darker towards their extremi- 
ties; tips of femora and of tibiae darker; coxae yellow; fore 
barsitarsus nearly 7/8 as long as the tibia. Wings grayish hyaline, 
a distinct cloud covering the r-m crossvein extending up on the 
petiole of R2+3; space between the petiole of the cubitus and 
the anal vein, between the branches of the cubitus, and basal 
part of the anal angle more or less infuscated; veins yellowish 
brown; Sc ends opposite the base of Rs, petiole of R2+3 (measur- 
ed on a straight line from its base to base of fork) .64 as long as 
R3, petiole of the media measured from the crossvein 1.3 as 
long as Ml -1-2, the distance between the cross veins 2/3 as long as 
the m-cu crossvein. Halteres brownish with yellow peduncle. 
Length 2.5 mm. Type in my collection. Stanford University, 
Cal., March. 
Fig. 1. Claspers of males. Figs. 1, 3, 7 are in ventro-lateral aspect; 2, 4, 6 in ventral aspect . 
1. D. californica. 2. D. clavata. 3. D. modesta. 4. D. cornuta. 6. D. centralis. 
7. D. Similis. 5. Wing of male D. modesta. 
Dixa cornuta sp. nov. 
Male. Head, including proboscis, palpi and antennae, brown, 
front shining. Thorax, including scutellum, brownish yellow, 
with three dull, dark brown lines, the middle one divided by a 
