neic and Hide-known American Coccidas, 165 



aliout 270 fi. The base of lliis portion shows a broken ring 

 of large circular brownish glands, about 12-18 /j, diameter. 



cJ. — Scales cylindrical, pale brownish, rough, with an 

 oblique terminal cap. 



Bab. Zapotlan, Mexico, on sage, July 7 {Townsend). 



By its small size it resembles S. coloradensis. 



Tachardia rotundata, W. P. & T. D. A. CklL, sp. n. 



? . — Scale hemispherical, about 6 millira. long, 5^ broad, 

 4 high ; black, with a pink tint here and there, with a slight 

 protuberance on each side, but not exhibiting the raised points 

 of T. gemmifera ; margin with short tongue-like processes. 

 From the dorsal orifices spring white waxen threads. ? 

 (boiled) is pink, broad-oval, about 5 millim. long [T. falvo- 

 radiata, ingce, rubra, and mexicana are about 3 millim. or 

 less) ; spine long and slender, abruptly broadened, but not 

 greatly, at the base. Caudal process long and tapering, the 

 apical half strongly cliitinized. Dorsal excretory processes 

 very peculiar, dark brown and strongly chitinized, very 

 broad at base, inverted basin-shaped, with the apical portion 

 separated by a constriction, its broad termination truncate and 

 more or less trilobed. Young scales reddish, star-like in 

 form, with six rays. 



Larva long and narrow. J scales as usual in the genus, 

 but broadened in the region of the round cap, which is not 

 much over a third the diameter of the scale. 



Hab. El Platanas, Mexico, on '' Zicna " and " Guasima," 

 Aug. 4 [Townsend). 



Something like T. gemmifera, but that species has the 

 dorsal excretory processes subcylindrical, not contracted before 

 the apex. 



Tachardia nigra, Twns. & Ckll. 

 Tonila, Jalisco, Mexico, Aug. 3 [Townsend). 



Conchaspis angrceci, Ckll., var. Tiibisci, Ckll. 



Platanas, Jalisco, Mexico, on " Rosa Maria," Aug. 4 

 [Townsend) . 



East Las Vegas, New Mexico, U.S.A., 

 Nov. 23, l'J02. 



