198 PROC. ENT. SOC. WASH., VOL. 21, NO. 9, DEC., 1919 



Macrocepicoccus, n. gen. 



Pseudococcine forms with at least a posterior pair of dorsal ostioles, adult 

 female with antennae 9-segmented, very elongate, slender, nearly as long 

 as body, terminal segment shortest; legs correspondingly elongate, tarsal 

 claw nearly straight, without denticle; anal ring with six setae and two rows 

 of pores; cerarii typically with two stout spines closely surrounded by a 

 single continuous row of heavily chitinized trilocular pores, these surrounded 

 in turn by a scattered circle of short tubular ducts; some of the anterior 

 cerarii much reduced, with only the tubular ducts remaining; with only 

 multicular disk pores, both dorsally and ventrally, in addition to the gland 

 types already mentioned; anal lobes small, with short apical hair and without 

 ventral chitinous thickening. 



Type of genus. Macrocepicoccus loranthi, n. sp. 



The characters of this genus are such that it is not possible to 

 place it accurately in the existing schemes of classification for the 

 Pseudococcine coccids, but for the present it can probably be 

 considered as being more closely related to the genus Pseudococ- 

 cus than to any other. 



Macrocepicoccus loranthi, n. sp. 



Adult Female. -Occurring normally on the under sides of the leaves of the 

 host, usually in numbers; maximum length of living specimens about 2 

 mm., width less than 1 mm., elongate, rather slender, broadest at the base 

 of the abdomen, highest at the same point, moderately convex dorsally, very 

 pale yellowish with a faint greenish tinge; body dorsally with faint traces 

 of white mealy secretion, this most pronounced just inside the body margin 

 and again in a submedian band on each side, thus forming two very vague 

 and indistinct longitudinal stripes; also dorsally with scattered very delicate 

 glassy threads, these most conspicuous along the margins where they fre- 

 quently project as far beyond the body as do the femora or even farther, 

 and where they are grouped into a series of clusters, each surrounding a 

 single one of the most conspicuous features of the insect, long, slender cylin- 

 drical white wax threads, which project forward, laterally and caudally from 

 the margin, normally to the number of ten on each side of the body, and 

 which in mature undisturbed examples may reach a length of one and a 

 half or more times that of the body of the insect, although usually irregularly 

 broken off, so that only rarely are any two the same length; with an addi- 

 tional pair of stout, much shorter wax plates projecting from the anal region ; 

 insect in the dried state retaining much the same outline as when living, 

 although becoming much flattened and dull brown in color. 



Body of Female. -Maximum length mounted on a slide about 2 mm., max- 

 imum width less than 1 mm. ; elongate, rather slender, broadest in the region 

 of the anterior abdominal segments; antennae very elongate, slender, linear, 

 9-segmented, the first and last segments shortest, the first about twice the 

 .diameter of any of the others, with a fairly large circular pore at the apex 



