144 INSECUTOR INSCITI/E MENSTRUUS 



Rhachoepalpus cinereus, new species. 



Length of body, 11 to 15 mm., not including spines ; of wing, 1 1 to 

 15 mm. Thirty-four males and three females, as follows: Matucana, 

 8,000 feet, one female, January 30, 1913; five males, August 1 , 1913; 

 one female and three males, August 16, 1913, all on foliage. Verrugas 

 Canyon, about 5,500 feet, one female, June 25, 1913; nineteen males, 

 July 9 and 10, 1 9 1 3, on flowers of Buddleia occidentalis ; and seven 

 males, July 23 and 24, 191 3, on same flowers. 



Head silvery-white pollinose, with bluish tinge from the black ground 

 color beneath ; the parafrontals dusky olive in ground color. Antennae 

 black, the second joint shining. Frontalia dark brown. Occipital pile 

 grayish or bluish-white, extending on lower edge of cheeks; hairs of 

 front, parafacials, and cheeks black. Thorax, scutellum, and abdomen 

 dull olive from the brassy-cinereous pollen covering all, yet whole rather 

 shining as though lacquered over. The four narrow thoracic vittae most 

 indistinct at best, rarely visible. From behind the parafrontals show same 

 olive as rest of upper parts, with narrow borders of silvery. Venter 

 concoiorous, with silvery on sides. Pleurae subsilvery. Legs blackish, 

 the tibiae faintly to noticeably reddish in good lights. Wings rather 

 deeply fuscous throughout. Front scale of tegulae translucent subhyaline, 

 wdth black narrow border and fringe of fine pilosity ; hind scale opaque 

 watery or watery-whitish, with tawny border. Pulvilli tawny-yellowish, 

 claws broadly yellow on base. 



Type, femcJe, Matucana, January 30. 



Rhachoepalpus nitidus, new species. 



Length of body, 12 to 13 mm.; of wing, 12.5 to 13 mm. Two 

 females, Matucana, 8,000 feet, August 16, 1 9 1 3, on foliage. 



Differs from R. cinereus in lacking pollen other than a very thin and 

 unnoticeable coat. Whole head blackish in ground color, with only a 

 thin bloom of silvery over it. Parafrontals, thorax, scutellum, and abdo- 

 men deep shining metallic greenish-black, the thoracic vittae scarcely 

 visible, pollen of abdomen and other parts visible only in oblique lights. 



Legs, wings, and tegulae practiceilly same, even to the faint reddish of 

 tibiae in one specimen. 



(To be continued.) 

 Date of publication, October 2, 1914. 



