MAY FLIES AND MIDGES OF NEW YORK 105 



This name was first given by its author (Kieffer 18996) to 

 a genus characterized thus : The wings are bare, the media 

 simple, the tarsal claws without teeth. Type of the genus is 

 Ceratopogon femoratus Fabr. This species has now 

 been made the type of the subgenus Serromyia (q. v.). In 

 a later paper Kieff er (1902) made C e r a t o 1 o p h u s a sub- 

 genus of P a 1 p o m y i a . But since, according to Skuse (1889), 

 Palpomyia has the femora armed, O e r a t o 1 o p h u s 

 better be retained as a distinct genus. Several American species. 



Ceratolophus sp. 



The egg-laying of this species was observed by Professor 

 Needham, Dr. A. D. MacGillivray and the writer in July. The 

 little flies hover in considerable numbers near the rocks over 

 which the spray of Fall creek dashes. Selecting a suitable spot 

 upon the rock, above the surface of the water, but splashed by 

 the spray, the female begins egg-laying. The eggs are laid 

 rapidly, about two per second, until several hundred eggs have 

 been set up on end, side by side in a little clump of about 5 mm. 

 in diameter. Upon a isingle suitable rock many clumps may be 

 found. The eggs when first deposited are white^ but they soon 

 become black. Another species not determined lays a similar 

 clump of eggs on the surface of the pond lily leaves. The larvae 

 which emerge I was unable to distinguish from newly hatched 

 larvae of other species. 



Imago. Black, legs paler, length 2 mm. Head subshining black; 

 mouth parts and antennae fuscous, the basal joint of the 

 latter black. Thorax wholly shining black, when viewed obliquely 

 a little pruinose. Abdomen dull black, the first and last joints 

 brownish. Femora yellow, the liind pair brown on the apical 

 half; the fore tibiae yellow, the middle pair pale brown, the hind 

 ones dark brown. All tarsi brown. All legs with few hairs and 

 no prominent setae. Wings hyaline, bare. Halteres black. The 

 crossvein-like Rg is situated near base of the radial cell. Ithaca, 

 N.Y. 



Genus 9. Palpomyia Megerle in litt. 



Meigen, Sy»t. Beschr. 1:65. 1818. Stephens, Catalogue Brit. Dipt. 



238. 1829 



On page 238 of his Catalogue of British Insects (1829) Stephens 

 affixes this name to all species of Meigen's group B of Cera- 



