THE CANADIAN ENTOMOLOGIST. 53 
Tipula arizonica, sp. n. 
Male — Length 9.8-10 mm.; wing 11.3 mm. 
Female — Length 14.5 mxm.; wing 14 mm. 
Palpi pale yellow with black hairs, the third segment with a 
sparse pale gray bloom, the terminal segment dark brown. Frontal 
prolongation of the head elongate, shiny yellowish, the extreme 
base light gray; nasus prominent. Antennae indistinctly bicolorous, 
the basal segments light yellow; the third segment yellow, passing 
into brown on the apical half; remainder of the flagellum dark 
brown, the basal enlargement a little more intense, the segments 
slightly incised. Head light gray with a subimpressed, very in- 
distinct median brown line; a row of large hairs following the inner 
margin of the eye. 
Thoracic dorsum opaque light yellow, without distinct stripes, 
although they may be faintly indicated beneath the bloom. Pleura 
yellow, with a sparse whitish bloom. Halteres rather short, but 
slender, brown, the knob a little darkened. Legs with the coxae 
yellow, very sparsely white pollinose; trochanters yellow; femora 
light yellow, soon passing into brown; tibiae brownish yellow; 
tarsi lirown. Wings hyaline or nearly so, the costal cells yellowish, 
the stigma a little brownish, veins brown. 
Abdominal tergites yellow, the segments three to six more 
brownish, the segments broadly ringed with silvery; a rounded 
brown spot on the sides of segment two beyond mid-length of the 
sclerite; rounded brown spots on the sides of segments three to 
five at the base; hypopygium brownish; sternites yellow, the 
sclerites somewhat indistinctly ringed with silvery. Ninth tergite 
large, the lateral angles produced slightly and bent strongly ventrad ; 
eighth sternite very large, prominent, the apex with a dense brush 
of yellow hairs. 
The female is like the male, but the antenuce are shorter and 
more distinctly bicolorous; the spots on the sides of the abdomen 
rather distinct; tergal valves of the ovipositor very long, the tip 
rounded, the sternal valves very short, the apex abruptly truncated. 
Holotype, cf , Williams, Arizona; May 30 (H. S. Barber). 
Allotype, 9 , topotypic; May 29. 
The type is in the collection of the United States National 
Museum, the allo.type in the collection of the author. 
