November, 1886.] 



121 



TipuJa hortorum, L., F. S., 1741 ; Steph., Sys. Cat., II, 248. 



T. excisa, Schum., Bes. Schles. Tip., 42 ; Wlk., I. B. D., Ill, 323 : undoubtedly T. 



scripta, Mg. 

 T. arcf.ica, Curt., Ross. Exp., 11, T. A., 15 ; Dale, Ent. Mo. Mag., XX, 214, = 



nodulicornis , Ztt. ? 

 T. irrorata, Mcq., Sui. a Buff., I, 84; Curt., B. E.,''493. 

 T. Diana, Mg., Sys. Bes., I, 189 ; Wlk., B. M. Cat., 62. 

 T.fenestrata, Schum., Bes. Schles. Tip., 59 ; Wlk., B. M. Cat., 60. 

 T. ccesia, Schum., Bes. Schles. Tip., 65 ; Wlk., B. M. Cat., 61. 

 T. fimbriata, Mg., Sys. Bes., I, 190 ; Wlk., I. B. D., Ill, 327: under this name I 



have only seen T. paludosa, Mg. 



T. lineola, Mg., Sys. Bes., I, 181 ; Wlk., I. B. D., Ill, 323. 



T. aelenitica, Mg., Sys. Bes., I, 187 ; Wlk., I. B. D., Ill, 329, = T. peliostigma, 

 Schum. 



Neuratiou of Cladura, adapted after Osten-Sacken. 



Costal vein = upper edge. 

 Mediastinal veiu ends at a 



Subcostal 



Badial 



Postical 



Anal 



Axillary 



... 6 



Prajfurca = part of radial vein I Submarginal cells 1 & 2 



from its origin until its forks, Posterior cells 3 to 7 



Subcostal cross vein ^ Anal cell 8 



Marginal ,, i ' Discal cell 9 



Small „ A- I Basal cells 10,11 



/I Great „ I I 



(4) 

 (3) 

 (2) 

 (1) 

 5 (68) 



Anal vein absent. 



Thorax without any transverse suture Dixa. 



Thorax with a transverse suture ... PtycTioptera. 



Anal vein present. 



Mediastinal vein ending in the costal and connected with the subcostal by 

 the subcostal cross vein ; last joint of palpi shorter or not much longer 

 than the two preceding joints taken together Limnobiad.s;. 



6 (25) One submarginal cell. 



7 (14) Antennae 14-jointed (empodia indistinct or none) LimnohiincB. 



8 (13) Proboscis not longer than the head. 



9 (12) Antennae simple. 



10 (11) Tip of the mediastinal vein usually far beyond the origin of the prtefurca ; 



the c? forceps consists of two horny hooks Limnohia. 



11 (10) Tip of the mediastinal vein usually about opposite the origin of the prse- 



furca; the $ forceps consists of two fleshy lobes Dicranomyia. 



12 (9) Antennae pectinate or sub-pectinate Rhipidia. 



