482 NEW YORK STATE MUSEUM 



with a long, stout, crooked terminal spine. Claspette possibly- 

 represented by a patch of long, thick setae near the middle of the 

 basal segment. Harpes stout, short, the broadly rounded apex 

 crowned with a number of stout, curved, chitinous spines. Harpa- 

 gones rather slender, slightly curved and with a stout, acute, 

 recurved apical spine. Unci approximate, slender, tapering 

 slightly to the nearly truncate, serrate posterior edge. Both the 

 harpes and harpagones are unusually small compared with the clasp 

 segments. Setaceous lobes indeterminate. 



This species, judging from the general characters presented by the 

 wing, should be closely allied to Theobaldia or Culiseta. 



CULEX 



This genus as now restricted to the Pipiens group, is fairly homo- 

 geneous, the various members showing marked similarities in both 

 adult and larval characteristics. Some of the species approach 

 each other so closely as to make it exceedingly difficult to separate 

 them satisfactorily in both adult and larval forms, though differ- 

 ences in one stage or the other or considerable divergence in habits 

 is ample evidence of the validity of the various species. The 

 male Culex is characterized by the rather slender, sparsely plumed 

 palpi usually with the terminal and a portion of the fourth segment 

 extending beyond the tip of the proboscis. The wings exhibit a 

 rather generalized type in the very long fork cells and relatively 

 short petioles thereof. The male genitalia are rather complex in 

 type, rendering it very difficult to satisfactorily homologize the 

 various parts. The claspette is very characteristic in most forms, 

 having a well inarked spatulate organ in association with a sub- 

 apical group of more or less varied, slender, chitinous spines. It 

 may eventually prove best to limit the genus strictly to those forms 

 having a well developed spatulate organ, but in the absence of more 

 striking differences, it seems advisable for the present to include in 

 this group all forms having the characteristic subapical group of 

 spines so well developed in Pipiens. The harpes diverge widely from 

 those of other Culicinae, in that the chitinous, falcate blade is basal 

 or nearly so, whereas in most of the other forms it is apical. The 

 harpagones show a marked tendency to division, giving the ap- 

 pearance of additional organs. The female genitalia usually consist 

 of a simple pair of more or less orbicular lobes. 



The larvae are all long tubed forms and resemble each other very 

 closely, though in most species excellent characters for their separa- 

 tion may be found in the varying proportions of the air tube. The 

 pecten at its base is valuable in recognizing species. There are 

 also useful variations in the antennae, particularly in the position 



