1*78 Journal New York Entomological Society. [Vol. vi. 



imbricatum, etc., characterized by the short rudimentary legs. It comes 

 nearest to the Brazilian perconvexum Ckll. 



On twigs of tree called "cafetillo," San Antonio del Sapotal, 

 near Frontera, Tabasco, June 2, 1897 (Townsend). Div. Ent., No. 

 7809. 



Aspidiotus jatrophas, sp. nov. 



Belongs in the subgenus Diaspidiotus. 9 scale circular to suboval, convex» 

 pale grayish-brown, \% mm. in diameter. Exuviae nipple-like, situated usually to 

 one side of the middle, concolorous with rest of scale but of a darker shade. <J scale 

 suboval or oblong, same color or a little paler than 9 » l mm. long and about or little 

 more than half as wide. Scales not leaving a white surface on the bark when de- 

 tached. 



9. Ci-'cumgenital glands absent. Anal orifice near posterior extremity. Three 

 pairs of lobes. Median lobes large, oblique, very strongly notched on outer side, not 

 at all on inner side. Well marked glandular incisions in the interlobular intervals. 

 Chitinous processes of the glandular incisions resemble those of A. betula. First 

 interlobular interval moderately wide. Second and third lobes minute, dentiform. 

 Spines unusually large and stout. Outer spine-like plates much branched, those of 

 first interlobular space simple and two in number. Body of 9 broad pyriform, yel- 

 lowish brown. Species doubtless viviparous, as the 9 is filled with large well 

 developed embryos, and lacks the circumgenital glands. 



$ and 9 scales massed together on bark of main stems and branches 

 of Jatropha sp., called "chaya," a cultivated plant whose green juicy 

 stems are cooked for food. Frontera, Tabasco, May, 1897 (Town- 

 send). Div. Ent., No. 7682. This is a southern species of a northern 

 type. 



Aspidiotus agavis, sp. nov. 



Belongs in subgenus Chrysomphalus. 9 scale circular or subcircular, brownish- 

 gray, the marginal portion whitish. Exuviae central, black or blackish, more or less 

 covered with a gray secretion which is usually scaled off and shows only as a border 

 to the exuviae. Diameter, 1 to 1^ mm. 



9 . Body deep yellow. Three pairs of lobes. Median lobes widened, ap- 

 pearing like human incisions, contiguous to each other. Second pair of lobes about 

 one-fifth wider than median, third pair same as second. Distance between median 

 and second pairs of lobes less than half width of one of the median lobes. Distance 

 between second and third pairs nearly equal to width of one of the median lobes. 

 Spine-like plates moderately short. There is a rudimentary angular fourth lobe be- 

 yond the third pair, and the margin of the body beyond the lobes is serrate for a dis- 

 tance equal to that occupied by the lobes of one side, the serration being composed 

 of smaller spine-like plates. Beyond this the margin of the body is minutely serrate. 

 Four groups of circumgenital glands, cephalolaterals 16 in each group in one speci- 

 men; in another 13 to 16, more or less prolonged inwardly in group outline instead 

 of rounded as normally. Caudolaterals apparently with 8 glands each. 



