ART. 12. MASKELL GENERA OF COCCIDAE MOERISOlSr. 71 



tide; margin of bodj^ with a single row of rather long, slender setae, 

 spiraciilar spines stout, short, apices rounded, occurring singly, 

 shorter than marginal setae, the latter accompanied by ventral sub- 

 marginal and submedian rows of much smaller setae; anal plates 

 each half-oval, with three apical and subapical setae, all short, and 

 one ventral seta; anal ring small, with pores and six setae. 



Cotype.—Q^i. No. 24769,' U.S.N.M. 



In 1890 Maskell described another species in this genus, an exami- 

 nation of a specimen of which shows that it is very closely related 

 to the type, although on the basis of the scant material available 

 apparently distinct. This species is L. ininor Maskell. The follow- 

 ing generic diagnosis has been prepared from both these species, but 

 even then is incomplete in many respects, and is subject to revision 

 on the basis of the studj^ of more satisfactory material. 



GENERIC DIAGNOSIS OF LECANOCHITON. 



Coccine forms (of Fernald Catalogue), adult female Avith the 

 exuvium of the preceding stage remaining attached to tlie middle of 

 the dorsum, at least appearing as if covered by a hard test; dorsal 

 derm heavily chitinized, body circular, convex, antennae present, 

 size and number of segments reduced, legs wanting, mentum 1-seg- 

 mented, spiracular spines wanting, marginal setae wanting, no 

 dorsal or ventral derm setae, with slender tubular ducts dorsally and 

 quinquelocular pores of one size ventrally adjacent to the spiracles, 

 anal plates slender, with dorsal, apical, and ventral setae, one pair 

 of fringe setae, no hypopj^gial setae, anal ring small, with pores 

 and six setae; larva oval, antennae 6-segmented, legs normal, mar- 

 ginal setae slender, spiracular spines single, stout, rounded at apex, 

 anal plates half-oval, with apical setae, anal ring with pores and 

 six setae. 



Between the uncertainty in regard to some of the structural cliar- 

 acters of the included species and the confusion existing in the 

 generic classification of the subfamily in which the genus belongs 

 the writers are unable to offer any suggestions as to its relation- 

 ships; the apparent retention of the exuvium of the preceding stage 

 by the adult female appears to provide a distinguishing identifica- 

 tion character which can be used until the true relationships of 

 the genus have been determined. 



Genus CTENOCHITON Maskell. 



Plate 4, fig. 3. 



Genotype. — Ctenockiton viridis Maskell. 

 Reference.— FQVT\ix\d, Cat. Cocc. World, 1903, pp. 159, 161. 

 In spite of the fact that this genus was described in 1879, the first 

 designation of a type species for it does not appear to have been made 



