1885.] E. T. Atkinson — On the IIomo])terous Family Coccidae. 281 



4. Body convex above and expanded on the margin ; cleft pos- 

 teriorly, lobes obtuse, approximate, inflexed : antennae short, conical, 

 6-jointed, three basal joints large, terminal snb-eqnal, small : feet robust 

 short, tibia hollowed anteriorly to receive the tarsus, which is ovate, 

 acute, furnished with a pointed claw : — Lecanopsis, Targ. [Sign., 1. c. 93]. 



5. Differs from the preceding in having neither feet nor antennaa 

 in the adult state : — Aclerda, Sign. [1 c. 96]. 



6. Created for the lac-insect of India : — Garteria, Sign. [1. c. 101] : 

 see A. M. N. H. i. p. 10 (1861) for Carter's description. 



Lecanium, Illiger. 

 Sign., A. S. E. F. (5 ser.) iii, p. 395 (1873). 



Signoret includes in this genus species which are naked, more or 

 less flat or globular, smooth or rugose : lower-lip with a single joint : 

 abdomen cleft at the anal extremity and with two triangular lobes or 

 scales above the cleft. 



Signoret has divided the genus, which is numerous in species, into 

 six sections or sub-genera : — 



1. Insect flat j segments of the body distinguishable ; usually 

 viviparous : antennae in adult ? , 7-jointed ; in larva, 6-jointed : — L. hes- 

 peridum, Linn. 



2. Insect more or less elevated, but elongate, and some having a 

 kind of dorsal ridge : usually oviparous : 2 ordinarily with 7-jointed 

 and sometimes 8- jointed antennse, larva with six : — L. persiccd, Fabr. 



3. More or less elevated, globose, hemispherical ; skin of a peculiar 

 tessellated structure : antennae in ? , 6— 7-jointed. L. aceris, Schrank. 



4>. More or less globose, hemispherical ; the skin is perforated with 

 oval cellules or openings ; tarsi jointed ; antennae in ? , 8- jointed. L. 

 coffecB, Walker. 



5. In which the skin is ragose and the dorsal disc has one longi- 

 tudinal and two transverse ridges and is marked by a more or less 

 irregular pattern formed of cellules or openings : antennae usually 

 8-jointed. — L. depressum, Targ.-Tozz. 



6. Entirely globular except the part attached to the food-plant • 

 antennae and feet wanting : — L. emerici, Planchon. 



Lecanium hesperidum, Linn. 



Coccus hesperidum, Linn. Syst. Nat. ii, 739 (1735) : Fabricius, S, R. (1803). 



Calymnatus hesperidum, Costa, Nuov. Obser., t, i, f . 1 ? (1835). 



Calypticus hesperidum, Costa, Faun. Ins. Nap. 8, 1 (1837) : Lubbock, Proc. 

 Royal Soc. ix, p. 480 (1858) ; A. M. N. H. (3 ser.) iii, p. 306 (1859) : Beck, Trans. 

 Micr. Soc. (n. s.) p. 47 (1861). 



