GENUS HEMICHIONASPIS. 



Hemichionaspis Cockerel!, Am. Nat., Vol. XXXI., p. 592 (1897). 

 Hemichionaspis Cockerell, First Suppl. Check-list Coccidae : Bull. 111. 

 St. Lab. Nat. Hist., Vol. V., p. 397 (1889). 



SCALE OF FEMALE. Plate i, Fig. 4. More or less pyriform in 

 outline, though sometimes elongated and narrow. Ventral scale 

 only slightly developed. Exuviae at the anterior extremity, the first 

 one partly overlying the second. First exuvia naked, second more 

 or less covered by secreted matter. Secreted portion varying from 

 white to brown or yellowish. 



FEMALE. Plate 6, Fig. i. Elongated, broadened posteriorly, con- 

 spicuously segmented. Abdominal segments with a more or less 

 distinct group of small nearly circular gland-orifices on each side, 

 more distinct near the pygidium (Plate 6, Fig. 6.). More or less 

 distinct rows of oval gland-orifices on the dorsal surface, between 

 the segments. A group of gland-spines on each side of the abdom- 

 inal segments, more distinct near the pygidium than anteriorly. 

 The characters of the pygidium are as follows : One, two or three 

 pairs of lobes present. Median lobes with their inner edges straight, 

 parallel, and close to each other or touching for their entire length, 

 the outer edges being rounded and either crenate or serrate. These 

 two lobes together form approximately a semi-circle, and are darker 

 than the other lobes (Plate 9, Fig. 9.). Lobes of the second and 

 third pairs, when present, composed of two lobules of which the 

 inner is larger than the outer. Gland-spines simple and usually 

 quite large and conspicuous. Spines usually plainly visible ; those 

 on the dorsal longer than those on the ventral surface. Circuwgen- 

 ital gland-orifices always present and arranged in five groups. 



SCALE OF MALE. Plate i, Fig. 4 A. Elongated, uni-carinate or 

 tri-carinate. Ventral scale complete forming with the upper part, a 

 tube. Plate i, Fig. 4 A represents the male scale of aspidistrac, the 

 type of this genus. Plate 6, Fig. 7, shows it in cross section. 



REMARKS. 



This genus is, as a rule, tropical in its range of distribution though 

 aspidistrae has been found far north of the tropics in greenhouses. 



