FUNGUS GNATS OF NORTH AMERICA. 187 



ADDENDA. 



Moiioclona furcata n. sp. 



Resembles i-lcgaiitiila in coloring but differs in the form of its 

 hypopygium. the sHg-htly greater length of the fore metatarsus 

 relative to its tibia, and in the relative positions of apices of 

 Sc, R^ and R^+r.. 



Male. Length 4 mm. Head black ; palpi, face, scape of an- 

 tenna and the 2 basal joints of flagellum yellow, the remaining 

 flagellar joints fuscous. Thorax yellow, the mesonotum with 

 3 blackish stripes, metanotum, some spots on the pleura and the 

 sternum more or less infuscated ; hairs pale. Each abdominal 

 tergite largely brownish, yellowish at the incisures, venter yel- 

 low ; hypopygium dark brown, each limb of the forceps with 2 

 strong hooks united to a broad base to which is attached a very 

 slender fishhook-like process projecting mesad. Legs yellow, 

 tarsi somewhat darker; fore metatarsus over 0.95, the second 

 fore tarsal joint over half as long as the fore tibia; tarsal claws 

 each with a strong tooth at the base. Wings yellowish hyaline, 

 veins dusky yellow ; the small cell shorter than wide ; the dis- 

 tance from the apex of Sc^ to R^ is over 2.5 times the distance 

 from Rj to R^,-, ; in clcgaiifiih these distances are to each other 

 as 2 to I. Stem of the halteres yellow, the elongate knob black. 



A single specimen taken at Orono, Maine, May 26, 1910. 



