WEST INDIAN HOMOPTERA. 49 



J^OTES ON L,E€A»fIUI»I, WITH A LIST OF THE 

 WEST IIVDIAIV SPECIES. 



BY T. D. A. COCKERELL. 



The Coccid genus Lecanhim Illig. consists at the present time of 

 about eighty nominal species, and is practically cosmopolitan. 8ig- 

 noret, in 1873, divided the genus into six series, some of which might 

 be regarded as distinct genera or subgenera. 



FIRST SERIES. 



Consists of flat and often viviparous species, of which L. hesperi- 

 dwn L. may be taken as the type. The others are L. acuminatum 

 Sign., L. angusiatum Sign., L. frenchii Mask., L. lauri Boisd., L. 

 longulum Dough, L. maculatiim Sign., L. viangifene Green, L. mini- 

 mum Newst., L. tessellatum Sign., and L. viride Green. If this group 

 were to receive a subgeneric name, Calymnatus Costa, 1827, is ap- 

 parently available.* 



(1.) Lecanium hesperidum (L.) Sign.— In January, 1892, Mr. 

 W. Harris sent me, from Cinchona, Jamaica (5000 feet altitude), 

 two little scales found on an orchid of the genus Stelis. They were 

 in poor condition for examination, and the largest only 3 mm. long ; 

 color pale brownish. So far as could be made out, they were the 

 young of hesperidum, but it is singular that, except for this instance, 

 the species has never been found in Jamaica. [Since this was written 

 I have found a single adult 9 of hesperidum, with young, on the 

 midrib of the upper side of a mango leaf, in Kingston.] 



(2.) Lecanium mangiferae Green. — Fairly common in Kingston, 

 Jamaica, on Maiigifera and Jambosa. First found by Mrs. Swainson. 

 This species, which has also been found at Demerara, is easily rec- 

 ognized by the subtriangular shape and the branched hairs along the 

 margin. Eggs are produced, but the young larv?e at first take shelter 

 beneath the body of the parent. 



* So far as I cau gatliei- fron) Signoret's work, it seems that Calypticus Costa was 

 first applied in 1829 to C. spumosus Costa, wliich is Pulvinaria vitis. Therefore 

 Calypticus is not properly a synonym of Lecanium, hut might, according to very 

 strict priority, be brought forward to replace Pulvinaria. 



TRANS. AM. ENT. SOC. XX. (7) APRIL, 1893. 



