Vol. X] ALEXANDER— UNDESCRIBED TIPULIDJE 2)7 



Mesonotal praescutum brown without apparent stripes ; pseudosutural 

 f ovese and tuberculate pits shiny black ; scutellum and postnotum sparsely 

 gray pruinose. Pleura gray. Halteres pale, the bases of the knobs a 

 little darker. Legs with the coxae dull brownish yellow ; trochanters dull 

 yellow; femora yellow, the tips broadly infuscated; remainder of the 

 legs pale brown, the apical tarsal segments darker. Wings with a con- 

 spicuous gray tinge ; stigma oval, dark brown ; an indistinct brown fascia 

 along the cord, extending to the fork of M ; extreme base of wing a little 

 yellowish. Venation : Sc rather long, Sci ending at about three-fourths the 

 length of the long sector, Sc2 removed some distance from the tip of Sci, 

 Sci alone being about equal to r-m ; Rz short, sub-perpendicular to oblique 

 in position, subequal to or shorter than r-m ; cell 1st AU slightly narrowed 

 at its inner end ; basal deflection of Cui very oblique, inserted before mid- 

 length of cell 1st Mi, the angle between Ciii and Ms strongly acute. 



Abdomen dark brown, suddenly narrowed or constricted on the ventral 

 face at the base of the terebra. Ovipositor with the tergal valves very 

 long and slender, the tips slightly expanded and upcurved; sternal valves 

 much shorter. 



Habitat. — California. 



Holotype, 5 (No. 720), Santa Cruz, June 2, 1919 (E. P. 

 Van Duzee). 



Paratopotypes, 3 9 's. 



It is possible, though scarcely probable, that this species is 

 a member of the subgenus Rhahdomastix, the most northerly 

 known species of which is found in Panama. Specimens of the 

 male sex will be necessary to tell this. 



Tribe Limnophilmi 



Genus Limnophila Macquart 



Subgenus Neolimnophila, new subgenus 



Similar to Limnophila, s. s., diflfering as follows: 



Antennas with the four basal flagellar segments united into a 

 compact, elongate-conical fusion-segment, there being but ten 

 free flagellar segments beyond it. In the female sex the third 

 and fourth of these fused segments are less distinctly united 

 and a faint suture is sometimes evident between them. Pro- 

 notum small, narrowed anteriorly; prosternum distinct, nar- 

 rowed posteriorly, separating the pro-coxje. Wings with 

 i?2+3 longer than J?2 alone, r being generally inserted on 

 i?2+3 a short distance before the fork. Male hypopygium with 

 the pleurites very long and slender, the two pleural appendages 



