TNSECUTOR INSCITI^ MENSTRUUS 139 



popygium with the ninth tergite very reduced, hidden, the lat- 

 eral margins pale, the median area dark brown, shiny ; eighth 

 sternite unarmed. 



Holotype, male, Colorado. (From the collection of C. V. 

 Riley.) 



Type, Cat. No. 19979, U. S. Nat. Mus. 



Tipula satyr, new species. 



Male. — Length, 13 mm. ; wing, 15.3 mm. 



Palpi short, dark brown. Frontal prolongation of the head 

 short, light brown, the dorsal surface light gray, the nasus 

 prominent. Antennae with the first segment brown ; the second 

 segment brighter, more yellowish ; flagellum with the segments 

 almost unicolorous, dark brown, the basal enlargement a little 

 darker. Head light gray with a distinct frontal tubercle that 

 is indistinctly impressed medially. 



Mesonotal praescutum very dull yellow with three broad dark 

 brown stripes; pseudosutural foveas low down on the lateral 

 margin of the sclerite ; thoracic interspaces with abundant long 

 pale hairs ; scutum, scutellum, and postnotum dull gray. Pleura 

 gray, the dorso-pleural membranes more yellowish. Halteres 

 brown, the knobs darker. Legs with the coxae light gray pro- 

 vided with abundant long pale hair; trochanters brownish 

 gray ; femora yellow at the base, soon passing into dark brown ; 

 tibiae and tarsi brown. Wings light brownish gray, the costal 

 cells similar, not brightened ; stigma brown ; veins dark brown ; 

 a broad vitreous band before the cord extending into the base 

 of cell M4. 



Abdominal tergites hairy, dull orange with three brown 

 stripes, the lateral pair clearer ; segments 2 to 8 broadly ringed 

 with silvery around the caudal margin, broadest and clearest 

 on the second to fourth segments. Hypopygium with the 

 ninth tergite having the lateral angles prominent, obliquely 

 truncated, the outer lobe subacute, the inner lobe much shorter, 

 blunt; the angles separated by a double median notch; from 

 the outer margin of the base of the produced angles arises a 

 prominent, acute, conical, orange-colored horn that is directed 



