Dec, 1905.] Dyar : Abdominal Appendages of Mosquitoes. 185 



Thorax above shining blue-black, clothed with short black hair, a line over the 

 wings connecting with pleura and the pleura themselves covered with long, dense, 

 matted, yellowish white pubescence, not varied with black spots. A dense black 

 fringe around border of scutellum. Wings brownish hyaline. Legs black, shining, 

 clothed with short black pubescence, not pollinose. Abdomen shining steel-blue, 

 clothed with minute black hairs, not pollinose or pale pubescent except on penulti- 

 mate segment which is, excepting the apical margin, uniformly white pollinose and 

 clothed with long white hairs without exposed black spots. This white band ex- 

 tends over the entire segment and is very conspicuous and contrasting. Length, 

 16 mm. Width of head at vertex, 7 mm. 



Type : One male, Lodgepole, Cheyenne county, Nebraska, July. 

 Collection University of Nebraska. 



A very distict species belonging to the font 'in el/a group. 



Cuterebra tenebrosa Coquillet. 



The University collection contains a female from Hecla, Wyom- 

 ing (S. G. Clason) and two males from Sheridan, Wyoming, taken 

 August, 1900, which are referred to this species. They agree with 

 Coquillet's description except in the face marks, for none of these 

 specimens have any pollinose marks whatever on the face. This 

 character, however, as the description intimates, is probably more or 

 less variable in this species. Actual comparison with tenebrosa might 

 show specific differences. 



ILLUSTRATIONS OF THE ABDOMINAL APPEN- 

 DAGES OF CERTAIN MOSQUITOES. 



By Harrison G. Dyar, A.M., Ph.D., 



Washington', D. C. 



(Plate VIII.) 



Grabhamia mitchella? Dyar. (Plate VIII, Fig. 1.) 



Side piece elongate, outer lobe undeveloped, inner lobe small, 

 setose ; clasp moderately swollen centrally though not greatly inflated, 

 with long terminal spine. Harpe jointed, basal part rather straight, 

 uniform, apical filament long, as long as the basal part, uniform, 

 scarcely tapered. Harpago smooth, curved, concave, the tip narrow 

 and bent. Unci invisible. Appendage of the eighth segment small, 

 setose. 



