DURHAM DIPTERA. 89 



XIII. 135. 



76 (75). Stigma brownish yellow. Male genitalia without the 

 tufted plate beneath. 

 836. Tipula peliostigma, Schum. (?) 

 Bishop Auckland, 1 ?, 12-6-02. 



137. Xiphura, Brul. 



1 (2). Antennae not all black, joints 4, 5, 6, and 7 white at 



the base. (839. atrata, L.) 



2 (1). Antennas entirely black. (840. nigricornis, Mg.) 



138. Ctenophora, Mg. 

 Larvae in rotten wood. 



1 (2). A large brown blotch on the stigma extending to O. 



(841. ornata, Mg.) 



2 (1). The spot at the stigma small, not nearly reaching O. 



8 (4). Abdomen orange with black central spots, which often 

 spread in the female till only small orange side spots 

 are left. (843. pectinicomis, L.) 



4 (3). Abdomen black with yellow bands. (842. flaveolata, F.) 



They are all very rare, and I have not found any of them 

 in this county. 



Family XIV.— RHYPHID^E. 



Larvae live in rotting vegetable matter. 

 139. Rhyphus, Ltr. 



1 (4). Tip of the wing brown. 



2 (3). Dorsum with three dark stripes. 



844. Rhyphus fenes traits, Scop. 

 Bishop Auckland, 1 $, 14-5-02, 4 $, July, 1901 ; 

 Hesleden, 1 $, 23-4-01, 1 ?, 20-8-02. 



3 (2). Dorsum unstriped. (845. ductus, F.) 



4 (1). Tip of the wing quite clear. 



846. Rhyphus punctatus, F. 

 Bishop Auckland, 1 $, each 25-5-00, 31-5-01, 13-6-01, 

 1 ?, 3-6-0 ; Hesleden, 1 $, 4-8-00 ; Shull, 1 $, 5-9-00. 



