ART. 12. MASKELL GENERA OF COCCIDAE MORBISON. 103 



tudinal, with micropores and some setae ventrally, without internal 

 basal thickenings; intermediate stage in general resembling adult, 

 but less developed; larva not known. 



As not«d in the generic diagnosis, the chief basis for separating 

 this genus from Lcpidosaphes appears to lie in the absence of para- 

 genitals, a doubtful generic character. The writers prefer not to 

 comment definitely on the status of this genus at present. 



Genus TRICHOMYTILUS Leonardi. 



Plate 6, fig. 2. 



Genotype. — Mytilaspis formosa Maskell. 



References.— F^vn^l^, Cat. Cocc. World, 1903, pp. 304, 309.— Leon- 

 ardi, Ann. E. Sc. sup. agr. Portici, ser. 2, vol. 5, 1904, pp. 4, 23. 



Only the single-type species has ever been included in this genus. 



The Maskell collection includes two slides of this species, one of 

 " adult females, 1893," and one of " puparia with females and male, 

 1893," and besides this a small quantity of unmounted material under 

 No. 337. 



Adult female. — Scale as described by Maskell and Leonardi ; body 

 mytilaspiform ; antennae small, cylindrical tubercles with invagi- 

 nated apices and two slender setae protruding slightly and with a 

 stout short spine on the lip; spiracles slender, posterior without 

 pores, anterior with two trilocular pores; head with a few small 

 tubular ducts and setae; body segment between spiracles and that 

 posterior to hind spiracles with a triangular cluster of small tubular 

 ducts running from opposite the spiracle to and around each margin, 

 and with a few conical gland spines with expanded bases at the inner 

 apex of each, next two segments (abdominal) with similar clusters, 

 but denser and with the gland spines more numerous, gland spines of 

 the following abdominal segment reduced to two large, long tapering 

 ones at margin; pygidium with three pairs of small protruding 

 lobes, the median largest, spatulaform, with faint traces of notches 

 on inner and outer faces, not contig-uous, but united by a thickening, 

 and with a tiny triangular tubercle just inside of each and a median 

 pair of ventral setae, second lobes smaller and more slender than 

 median, very faintly notched, third stouter and larger than second, 

 usually nearly straight within and distinctly notched without, mar- 

 gin beyond third lobes somewhat notched ; gland spines present, un- 

 usually large and long, the first three double — that is, with two ducts 

 leading into a single spine — one present outside of each of the lobes, 

 the fourth either double or with tAvo separate spines, the fifth group 

 of two spines: marginal setae, dorsally two, small, just outside of 

 median lobes, one long, slender, anterior to both the second and third 

 lobes, another similar, anterior to the second toothlike projection 



