GENUS CORETHKA 501 



Table of the Species of the Genus Corethra. 



I. AVitli the wings sj)otted. 



A. With the wings dotted or banded. 

 a. With the antennae banded. 



1. Cor. pallida, Fabr. Ahnost colourless, but with a slightly 



reddish tint. Abdomuaal segments with the distal border 

 black. Wings with one band. 



2. Cor. Nyblcei (Zett.). Dull white. The abdomen, lateral lines, 



and minute spots fuscous. 



3. Cor. 2^U'nctipcnnis, Say. Generally pale yellow, with dusky 



hairs and down. Wings with several clear brown spots. 



4. Cor. gibba, Meigen. General colouration greenish. Wings 



with a single band. Characters of the legs and antennae not 

 noted. 



II. With the wings unspotted. 



A. With the legs darker at the apices of the tibiiB and tarsal joints. 

 a. With the antennae unhanded (?). 



5. Cor. pilipes, Gim. Legs frmged with long hairs on the inner 



and outer sides. 



B. With the legs uniformly coloured. 



a. With the antennae banded. 



6. Cor. phcrnicornis, Fabr. Pectus and sides of the thorax 



whitish. 



7. Cor. Manillensis, Schiner. Thorax pale orange, with three 



longitudinal brown lines. 



b. With the antennae unhanded. 



8. Cor. culiciformis, De G, Much darker in colouration than any 



of the other species. 



9. Cor. flavicans, Meigen. General colouration yellowish. 



10. Cor. rufa, Zett. Generally rufous, with bright brown thoracic 



marks. Legs more generally uniformly yellow. 



11. Cor. ohscuripes, Wulp. Generally darker than neighbouring 



species. Abdomen dark brown, with glossy greyish incisions. 



12. Cor. fusca, Staeger. Almost black, with the abdominal seg- 



ments bordered whitish, and the legs dirty yellow. 



13. Cor. Asiatica, sp. n. Pale straw-coloured throughout ; very 



hirsute, with indistinct thoracic ornament. 



1. CORETHRA PALLIDA, Fabr. 



Tqjula jpallida, Klass, "d Zoo," i, p. 34, and Fabr. " Ent. Syst." iv, p. 245; 

 also GmelUn, "Syst. Nat." v, p. 2,026, Cor. pallida, Panzer, "Fauna 

 Germanica," cix. 



Wings with an oblique brownish band in tlie middle. Legs 

 with numerous bands. Antennae black-ringed ; otherwise ahnost 

 colourless. 



