WILLIAM G. DIETZ 115 



sternite narrowly, the eighth broadly, V-shaped emarginate. Hypopygium 

 ferruginous, shining; ninth tergite but little wider than long, strongly nar- 

 rowed posteriorly, with a deep, oval impression in the middle before the pos- 

 terior margin, the latter with semicircular incision; from below the margin of 

 the latter project two slender, filamentous processes; outer appendages pale 

 yellow, apical two-fifths very slender, curved downward. Penis of unusual 

 length, penis guard semitubular; the gynophores (?) consist of two strongly 

 chitinized plates. 



Female. Length, 18 mm.; wing, 13.5 mm. 



Antennae relatively short, the flagellar points yellowish-fuscous, dark fuscous 

 at base. The abdominal stripes still more diffused and ill-defined ; eighth tergite 

 almost entirely yellow. Ovipositor testaceous, darker in basal portion; valves 

 of nearly equal length, the dorsal pair obtusely, the ventral pair acutely pointed. 



Holotype : <? ; Deer Creek, Provo Canyon, Utah. August, 

 1913. (Tom Spalding.) 



Allotype: 9 ; topotypic, August 20, 1913. 



Paratypes: five males, ten females, topotypic; one female, 

 Milpitas, California, April, 1912, (H. Miller). 



In the tipuloid group this form stands rather isolated. In 

 coloration it resembles P. {Tipula) pachyrhinoides Alexander, 

 but is much larger, the thorax less shining and the abdomen 

 striped. In the unusual length of the penis, it differs from any 

 other species of Pachyrhina or Tipula known to me. The oc- 

 cipital line varies in length and degree of coloring; in same speci- 

 mens, there is a small fuscous dot each side of the vertex. The 

 California specimen has the thorax subopaque, the dorsal ab- 

 dominal stripe black, entire; the eight segment and the hypo- 

 pygium very dark brown. 



Pachyrhina puncticollis spec. n. (PL IV, fig. 3.) 



Tipuloid. Sordid yellow. Antennae — male — rather short, fiagellum black; 

 a blackish spot each side of base of occiput. Thoracic stripes grayish-pollinose, 

 strongly margined with brown. 



Male. Length, 12 mm.; wing, 12 mm. 



Head ocher-yellow, shining; mouth parts and palpi brown, the last joint of 

 the latter short. Proboscis short, thick; nasus beset with short, black hairs. 

 Antennae short, stout, bent back they do not reach the alar insertion; basal 

 joint yellow, second joint yellowish-fuscous, fiagellum entirely blackish, some- 

 what compressed, segments of nearly equal thickness, not emarginate be- 

 neath or thickened at base, the last three joints attenuated, and longer, a verti- 

 cel of setae at base of segments; pubescence very fine and short. Frontal 

 gibbosity marked, a fuscous spot on the vertex, close to the orbital margin, 



TRANS. AM. ENT. SOC, XLIV. 



