TWO NEW SPECIES OF 
CERATOPOGONIDAE (DIPTERA) 1 
By Franklin B. Lewis 
Forest Insect and Disease Lab. 
U.S. Dept. Agric., Forest Service, New Haven, Conn. 
During an investigation of the bionomics and immature 
stages of the Ceratopogonidae, two new species were en- 
countered. The purpose of this paper is to describe these 
insects. 
Helea (Isohelea) serrata n. sp. 
Fig. 1 
Description : Antennae dark brown, pedicel black, vertex 
black ; eyes barely touching. Tergum of thorax shiny 
black with faint bluish brown pruinescence; pleurae shin- 
ing black; scutellum black. Femora brownish, all tibia 
with yellow- white apices ; tarsi whitish, claws unequal 
with small basal barbs. Wings milky- white; M2 broadly 
interrupted ; costal vein light brown ; radial cells with 
slight brownish infuscation; cell R1 longer than cell R2, 
cell R2 teardrop-shaped. Halteres with bases brownish, 
knobs white. Abdomen black-brown above with faint 
bluish pruinescence. Female resembles male in most re- 
spects, but has lighter legs. Tibial comb with six equally 
long spines, each about as long as tibial width at distal 
tip; five small spines between each two adjacant long 
spines; these small spines one half the length of the 
long spines. Male genitalia (Fig. 1) large, basistyles 
about as broad as long, dististyles very short and slender. 
Parameres separated at base, fused distally and finally 
separated at very tip, these tips recurved. Aedeagus 
1 A portion of a thesis submitted in partial fulfillment of the require- 
ments for the Doctor of Philosophy degree at the University of Con- 
necticut in 1955. 
46 
