XXXJii, '22] ENTOMOLOGICAL NEWS 207 



mind half a dozen little streams in the tropics, similar in si/.e 

 and general character to Davis Creek, and at once I recall a 

 dozen species which made the ripples flash with color, or which 

 sat motionless on dead twig tips on the darkest stretches of the 

 creeks, giving life and vivacity to a somber forest. No such 

 wealth of odonate life exists on Davis Creek where individuals 

 are as rare as species, except for occasional assemblages of 

 Caloptcry.v niacitlata. Frequently at sunrise individuals of this 

 species were seen resting inertly on leaves with all four wings 

 spread flat. 



Undescribed Crane-flies from Argentina (Tipulidae, 



Dipt.) Part V. 



By CHARLES P. ALEXANDER, Urbana, Illinois. 



The types of the novelties described in this paper are pre- 

 served in the collection of the writer through the great kind- 

 ness of Dr. Bruch and Senor Weiser, to whom my thanks are 

 due. 



Dicranomyia omissivena sp. n. 



General coloration whitish yellow ; antcnnal flagellum brown ; wings 

 whitish subhyaline, veins pale; Sc long, cell 1st M2 open by the 

 atrophy of the outer deflection of Af3. 



$ . 'Length 4.2 mm. ; wing 5.4 mm. 9 . Length 4.8 mm. ; wing 

 6 mm. Rostrum and palpi pale. Antennae with the scapal segments 

 pale yellow, the flagellum gradually darkening into brown. Head pale 

 yellow. 



Mesonotum pale whitish yellow without darker markings. Pleura 

 whitish yellow with slight green reflexions. Halteres pale whitish 

 yellow. Legs pale whitish yellow with only the terminal tarsal seg 

 ments dark brown. 



Wings whitish subhyaline; veins pale. Venation: Sc long, Scl ending- 

 opposite or just beyond midlength of Rs, Sc2 at tip of Sc\ ; Rs about 

 twice the deflection of A'4+5; cell l.v/ .1/2 open by the atrophy of the 

 outer deflection of .1/3; petiole of cell 2nd M2 shorter than the cell; 

 K-isal deflection of Cu} close to the fork of .!/. 



Abdomen whitish, the segments with greenish reflexions. 



Habitat : 'Argentina. llolotyfc. S, (Juehrada Knmriillu, 

 Ttu-unian, altitude 1600 meters, October 1(>. 1'PO ( V. Weiser), 



c, 9. rarutoptityl'cs. 3 6$. 



