June, 1905] Dvar : Abdominal Appendages of Mosquitoes. 55 



Feltidia cyanescens Coq. (Plate V, Fig. S.) 



Side piece elongate conic, basal lobe very slight, setose ; clasp 

 thick, inflated, reticular, the tip narrowed with a short spine. Harpe 

 curved, concave, spined at tip. Harpago cylindrical, truncate. Ap- 

 pendage of eighth segment undeveloped. 



Feltidia signipennis Coq. (Plate V, Fig. 9.) 



Side piece elongate conic, basal lobe rudimentary, setose ; clasp 

 thick, inflated, reticular, the tip narrowed with a short spine. Harpe 

 curved, concave, slightly spined at tip.* Harpago cylindrical, trun- 

 cate. Appendage of eighth segment undeveloped. 



Theobaldia incidens Thom. (Plate V, Fig. 10.) 



Side piece elongate, conic, lobes undeveloped ; clasp filamentous 

 with minute terminal spine. Harpe bent at tip, stout, uniform, with 

 irregular teeth. Harpago cylindrical, truncate. Unci invisible. 

 Appendage of the eighth segment broad, large, setose. A row of 

 very few short tooth-like spines at the tip of the seventh segment. 



Melanoconion atratus Theob. (Plate V, Fig. n.) 



Side piece thickly conic, lobes continuous, the outer with a leaf- 

 like scale, the inner with stout articulated spines ; clasp enlarged at 

 the base, slender outwardly, with minute terminal spine. Harpe 

 stout, concave, narrowed at tip. Harpago small, slender. Unci and 

 appendage of the eighth segment invisible. 



Culex tarsalis Coq. (Plate V, Fig. 12.) 



Side piece elongate, outer lobe distinct, with leaf-like scale and 

 stout spines recurved at tip ; no basal lobe ; clasp filamentous, curved, 

 with minute terminal spine. Harpe conic, heavily spined at tip ; an 

 additional pair of appendages at base with trifid apex. Harpago 

 broad, acuminate. Uncus long concave, narrowed outwardly. Ap- 

 pendage of the eighth segment stout and broad, setose. 



Explanation of Plates IV and V. 



Genitalia of mosquitoes, the parts of one side only shown. 



1. Deinoceritcs cancer Theob. from Jamaica. 



2. Wyeomyia smithii Coq. from Massachusetts. 



3. Grabhamia izstivalis Dyar from British Columbia. 



*The apparent difference in the direction of curve in the harpes shown in figures 

 8 and 9 is apparently unimportant, as I have another slide of signipennis in which 

 the curve is inward as in cyanescens. 



