NEW SPECIES OF CERATOPOGON. 1 



WILLIAM HENRY LONG, JR. 



The family Chironomidae has been much neglected by dipterol- 

 ogists, notwithstanding the number and diversity of its species. 

 Even the larval forms which are especially interesting have not, 

 as yet, received as much study as they deserve. The writer's 

 attention was first directed to this family by finding the larvae of 

 a species of Ceratopogon in large numbers in the vicinity of 

 Austin, Texas, during the winter months. Certain peculiarities 

 of its development induced him to extend his study to other species 

 of Ceratopogon in the same vicinity. This study brought to light 

 several interesting facts, some of which may prove of value in 

 separating the species of this large and complex genus. Two of 

 the species included in this article seem to be myrmecophilous, 

 the first, it seems, to be recorded from America. 



CERATOPOGON BRUMALIS, sp. nov. 



$ , length 3 mm., wing 2 x .5 mm. ; $>, length 2.5 mm., wing 2 x .75 

 mm. Two subcostal cells ; third or cubital vein terminating distinctly 

 before the middle of the wing with a white spot at apex of costal vein ; 

 wings and entire insect densely pilose ; halteres white ; metatarsi equaling 

 or slightly shorter than the following joint : tibia of female with black 

 lanceolate scales ; last four joints of the male's antennae longer than the 

 basal ten joints ; eleventh about 1.5 times as long as any succeeding joint. 

 Antennae not longer than mesonotum. 



9 , head piceous ; pile on tips of antennas and palpi whitish ; joints 

 2-9 of antennae ovate subequal, joint i much larger and more globose ; 

 joints 10 to 14 inclusive ovate-oblong ; apical joint prolonged into a 

 blunt point. Each of the joints 2-9 inclusive has two large sense 

 organs, which are curved, transparent and on upper surface of joint 

 about 90 apart ; other and much smaller sense organs occur near the 

 apex, three or more to each joint ; while joints 13 and 14 are fairly 

 covered with minute organs of similar nature. Each joint, except the first, 

 is pubescent and bears a circlet of bristles. Mesonotum dark brown, 

 pruinose, pile brassy ; sides of prothorax with a bunch of yellow bristles ; 

 pleurae naked ; mesopleurae white; abdomen black, shining, pile light yellow, 

 reddish in certain lights ; venter brown ; external genitalia subglobose, 



1 Contributions from the Zoological Laboratory of the University of Texas, No. 17. 



