498 



1. Metriocnemus lundbecki Johannsen 



Chironomus nanus Lundbeck (nee Meigen), Vidensk. Meddel., 1898, p. 285. 

 Metriocnevms lundbecM Johannsen, Bull. 86, N. Y. State Mus., 1905, p. 302. 



Larva. — Length, 4-5 mm. Yellowish. Labium with the central 

 tooth divided, general outline similar to that shown in Figure 16, Plate 

 XXIX, except that the divided central tooth has no shoulder ; mandi- 

 ble with 4 distinct teeth in addition to the apical one. 



Pupa. — Length, 3 mm. Greenish yellow. Thoracic respiratory 

 organs similar to those of Orthocladius nirorhindus. Abdominal seg- 

 ments 2-8 with dorsum covered with short setul-je which become 

 stronger posteriorly and form a distinct transverse band on caudal 

 margin ; apical appendages with 3 long hairs. 



Imago; Male. — Yellow, slightly shining. Mesonotum with red- 

 dish vittse. Abdomen yellow, apical 2-3 segments brownish. Legs 

 yellow, apices of tarsi infuscated. Wings clear, veins yellow. Hal- 

 teres yellow. 



Fore tarsi with basal joint nearly three fourths as long as fore 

 tibiae. Hypopygium with dorsal plate long and pointed. Third vein 

 ending at beginning of apical curve of wing. 



Female. — Agrees in color with the male. 



Length, 2-2.5 mm. 



Illinois localities: Muncie, March 16, 1914, and Havana, Novem- 

 ber 8, 1912 (C. A. Hart). 



I have seen a female specimen, submitted by Prof. O. A. Johann- 

 sen, from Ithaca, N. Y. 



2. Metriocnemus brachyneura, n. sp. 



Male. — Head brownish, antennae, including the plumes, fuscous. 

 Thorax greenish yellow; mesonotum with glossy blackish brown vit- 

 tse, the spaces between them covered with whitish pruinescence ; pleurae 

 with a large brownish spot on sternopleura and a smaller one in front 

 of wing-base; scutellum yellowish; postnotum brown. Abdomen 

 fuscous-green. Legs greenish yellow, brownish on apices of femora 

 and of mid and hind tibiae, the fore tibiae, except on middle, and apices 

 of all tarsi brown. Wings clear, veins and surface hairs brown. 

 Halteres greenish yellow. 



Last flagellar joint not as long as the preceding joints combined. 

 Pronotum linear. Hypopygium as in Figure 4, Plate XL. Legs 

 slender; fore tarsi without long hairs, basal joint more than two thirds 

 as long as fore tibiae (17:22); empodium distinct, fringed. Third 



