368 DUEHAM DIPTERA. 



LI. 637. 



32 (33). Third antennal joint nearly all black ; vertical triangle 



short ; abdomen shining black, base and sides 

 yellow. 



{Chloropisca circumdata, Mg.=ornata, Mg. ?) 



33 (32). Third antennal joint only black at the point ; vertical 



triangle with two reddish dots. 

 2714. Chloropisca ornata, Mg.=znotata, Mg. 

 Bishop Auckland, 2 $ and 2 ?, May, 1900. 



34 (31) (35). Legs with the femora widely brown ; abdomen 



shining black above ; anus yellow. 



{Chloropisca lineata, F. ?) 



35 (31) (34). Legs with the fore tarsi black ; vertical triangle 



black and long. (2715. Chloropisca glabra, Mg.) 



36 (26) (37). X-veins very near each other ; V.4 3 six times the 



length of V.4 2 ; V.2. and V.3. much bent upwards. 



{Diplotoxa curvinervis, Ztt.) 



37 (26) (36). X-veins so close together that X.5. is almost in 



a line with X.4. ; V.3. only gently curved. 



{Diplotoxa approximatonervis, Ztt.) 



38 (3). Antennae wholly black, sometimes brown at the base. 

 38a (38b). Fore tarsal joints very much shortened in the 



male. (2704. brevimana, Lw.) 



38b (38a). Fore tarsal joints of the male not shortened. 



39 (40). Small species, i-i£ mm. ; V.4 3 at least four times 



V.4 2 ; legs yellow ; hind tibiae ringed. 



{troglodytes, Ztt.) 



40 (39). Larger species, 2^-3 mm. ; V.4 3 about three times V.4 2 . 



41 (44). Legs yellow, only the tarsi partly dark. 



42 (43). Second and third fore tarsal joints pale ; metatarsus 



dark ; vertical triangle with a central channel. 

 2705. Chlorops tceniopus, Mg. 

 Hesleden, 1 $ and 1 ?, August, 1899. 



43 (42). Fore tarsi entirely black ; vertical triangle not 



channelled. {brevifrons, Lw.) 



44 (41). Legs dingy yellow ; fore femora and hind tibiae 



broadly dark. {brunnipes, Ztt.) 



