BY FREDERICK A. A. SKUSE. 221 



Ceratopogon, Meig. Chironomus, p. Fab., 18 sp. C. stigTna, 

 Meig. 



Antennse ^ plumose at the base, five terminal joints 

 elongated, simple in 9 ; all the femora simple ; second 

 joint of the palpi longest ; legs of nearly equal length ; 

 two sub-marginal cells. Meig., Zw. i. pi. 2, fig. 18. 



Palpomyia, Meig.'?, Steph. Ceratopogon, B. Meig., 10 sp. 

 C. spinipes, Meig. 



Differs from Ceratopogon in having the fore femora 

 thick and spinose beneath. Pz. 103.14. 



Prionomyia, St. Serromyia, Meig.?, Ceratopogon, C. Meig., 6 sp. 

 Ceratopogon femioratiis, F. Meig., Kl. pi. 2, fig. 4. 



Differs from Ceratopogon in having the hind femora 

 thickened. 



Culicoides, Latr. Ceratopogon, p. Meig., 6 sp. C. pulicaris, 

 Linn. 



Femora simple, not spined ; one large imperfect sub- 

 marginal cell. Meig., Zw. i. pi. 2, fig. 17. 



Labidomyia, St. Forcipomyia, Meig.'?, 2 sp. Cer. hipunctatus, 

 Linn., Meig. 



Orphnephila, Hal. Chenesia, Macq., 1 sp. 0. devia, Hal. 



Eyes confluent in front ; ocelli wanting ; antennae 

 very short, naked in both sexes ; base globose ; anterior 

 tarsi elongated ; wings incumbent, parallel. Zool. 

 Jour. Vol. v., pi. 15, fig. 2. 



The only other distribution of the genera that I have seen is 

 that by Haliday (Ins. Brit. Dipt. III. 18o6) in which five only 

 are included ; his arrangement is as follows : — 



a. Proboscis distinct, with (4-) jointed palpi. Metathorax 

 produced over the base of the abdomen. 

 h. Mesosternum compressed, gibbous, descending as low as 

 the ends of the posterior coxse. 

 c. Wings oblong, with anal angle more or less abrupt. 



