MAY ffLIES AND MIDGES OF NEW YORK 91 



ti Claws simple 



/ Very small species ; black, including its legs, wings 

 and halter es ; male with fourteen nearly bare joints, 

 female with seven joints ; legs with woolly hairs ; 

 metatarsi somewhat elongated; claws distinct, 



pl.34, figs. 6-11: 31. Hydrobaenus 



;;' Not such flies 



k Antenna of male with eight joints; female like 

 Orthocladius, ( Australia ) , pl.36, fig.26 



32. Doloplastus 

 Jck Antenna of male not eight jointed ; the female with 



seven joints 



I Wings very short, in the female scarcely reach- 

 ing the middle of the abdomen ; the abdomen 

 with a seta-like tubercle near the tip on each 

 side; fore tibia longer than the metatarsus 



(Spitsbergen) 33. S in i 1 1 i a 



U Wings of moderate length 



m Thorax prolonged and bent downward; hal- 

 teres hammer-like, pl.35, figs. 26, 27, 28 (Ar- 

 gentina ) . Synonym of Chironomus? 

 34. Burineisteria 

 mm Thorax highly arched ; halteres with knob 



( Group Chironomus} 

 n The fourth tarsal joint obcordate, shorter 

 Thalassomyia 



than the fifth. , 



45. S co pel odr om u s 



nn Tarsal joint linear 

 o Wings bare 



p Front metatarsi as long or longer than 



the tibiae 38. Cliiroiiomus 



pp Front metatarsi distinctly shorter than 



their tibiae 



q Legs black and white annulate, at least 

 the fore pair . . .39. C r i c o t o p u s 

 qq Legs not so banded 



r Posterior branch of cubitus sinuous, 

 pl.30, figs, 1 to 4 



40. Cainptocladius 

 rr This branch straight, gently arched, 

 pl.30, figs. 5 to 10 



41. Orthocladius 

 oo Wings hairy 



p Front metatarsi longer than their tibiae 

 42. Tanytarsus 



