DURHAM DIPTERA. 227 



XXXI. 370. 

 370. Demoticus, Mcq. 



1 (2). Proboscis very long and far protruding, horizontal, 



the second part bristle-like and longer than the 

 first. (1763. longirostris, Mg.) 



2 (1). Proboscis long, the second part moderately thick, and 



the suckers fairly broad. 



3 (6). Palpi orange. 



4 (5). Long veins all bare, or at most 3-6 bristles at the 



base of V.3. (1762. filebeius, Fin.) 



5 (4). V.I., V.3., and V.5. bristly. (1764. frontatus, Boh.) 



6 (3). Palpi black ; V.I. and V.3. bristly. 



(1765. sfiretus, Mg.) 



371. Myobia, Dsv. 



1 (2). Third antennal joint three times as long as the 



second. (1766. aurea, Fin.) 



2 (1). Third antennal joint only twice as long as the second. 



3 (4). Fore femora yellow below, and with a dark brown 



stripe above. (1767. fenestrata, Mg.) 



4 (3). Fore femora all yellow. 



5 (6). Hind femora as long as the abdomen. 



(1768. longiftes, Mg.) 



6 (5). Hind femora shorter than the abdomen. 



7 (8). Abdomen mostly yellow. ( l 7^9- inanis, Fin.) 



8 (7). Abdomen grey, at most yellow at the base. 



(1770. pacifica, Mg.) 



374. Olivieria, Dsv. 



1773. Olivieria lateralis, F. 

 Hesleden, 2 $ and 6 ?, July-August, 1899-1900. 



375. Ocyptera, Ltr. 



1 (2). Abdomen black, second and fifth segments orange, 



the second broadly so at the sides, more narrowly 

 in the centre. (1774. brassicaria, F.) 



2 (1). Abdomen black, except the second and third seg- 



ments, which are orange at the sides and broadly 

 black in the centre. ( I 775- cylmdrica, F.) 



