176 Journal New York Entomological Society. [Vol. vi. 



Ctenochiton aztecus, sp. nov. 



Length of 9 scale, 2 to 2.y z mm. ; width, \y z to 2 mm. ; height, I mm. or a 

 little less; in form convex, and leaving a very conspicuous white silk-like covering 

 on the bark when detached. Boiling in KHO gives a pale brown color. The secre- 

 tion of Q is g^ssy in appearance, and has the characteristic serrate frings on the 

 edge. The marginal fringe shows 12 to 15 short teeth on each side. The adult £, 

 after being denuded of the glassy secretion, is brown, but loses its color by boiling in 

 KHO, except the anal plates and adjacent edges of cleft which remain brown. In- 

 tegument shows a reticulated or honeycombed structure. Female apparently apodous 

 and without antennae. Marginal bristles extremely short, stout, and pointed, about as 

 far apart as twice their length, but varying. Anal plates triangular, taken together 

 hardly or nearly forming a square. Anal cleft deep, in some about one- fifth the 

 length of whole body, in others less. Two bristles at end of each anal plate, and 

 one on inner edge. Two longer bristles springing from their junction inside. The 

 females are full of larvse. 



Glassy secretion is minutely irregularly striate, but shows no distinct air cells ; it 

 is raised on the dorsal surface into tubercular processes, showing especially in the 

 more immature individuals. In the latter the processes take the form of a median 

 dorsal row, a marginal row, and a row on each side half way between the dorsal and 

 marginal. 



On bark of trunk of tree called " cafetilla cimarron," which means 

 wild coffee, but the tree is very distinct from coffee. Arroyo San Isidro, 

 near Frontera, Tabasco, May 27, 1897 (Townsend). Div. Ent., No. 

 7645- 

 Ceroplastes roseatus, sp. nov. 



9 scale. Greatest length, 11 mm.; greatest width, 8 mm.; height, 6 mm. 

 Color pale sordid yellowish, with a very faint rose tinge. Younger (smaller) speci- 

 mens measure 7 to 9 or 10 mm. in length, and show the wax clearer, whitish with a 

 pronounced roseate tinge or blush. Wax not divided into plates, no nuclei present. 

 Form in lateral profile low conical with the apex rounded, the two sides meeting at a 

 little more than a right angle ; in anterior profile the sides meet at less than a right 

 angle. The younger more roseate scales, with the fresh appearance to the wax, are 

 not so symmetrically formed, the anterior margin of the wax being lapped up in 

 front, and presenting just posterior to this a deep notch in the profile. Median dor- 

 sal tubercle of the wax is pale yellowish. Margin a little scalloped in dorsal profile, 

 showing about seven projections of the border. Thickness of wax at base, 3 mm. at 

 ends, averaging 2 mm. at sides. Surface of wax smooth, a little roughened in the 

 largest specimens. 



Body of 9> before being boiled, denuded of wax (basal measurements), 4 mm. 

 long, 2*4 mm - wide ; this being a specimen which measured 9^ mm. in length with 

 wax in situ. Dorsal tubercle prominent, high, narrow, but widened (or rather 

 lengthened) longitudinally, the sides giving the outline in lateral profile of a perfect 

 angle of 55 degrees. Sides of body showing seven distinct lateral tubercles, the an- 

 terior one being in the middle. Caudal horn very elongate and stout, about 2 mm. 

 long, and 4 5 ' mm. in diameter at base. Color of dorsum brownish-red, the caudal 

 horn black, becoming brown at base. Boiling in KHO gives a faint rosy tinge. 



