Cis guamae, Zimmerman, 1942

Zimmerman, Elwood C., 1942, Ciidae of Guam, Insects of Guam-I, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 47-52 : 49

2. Cis guamae , new species ( fig. 1 d ; pl. 1, B).

Dermal coloration in mature specimens as follows: dorsum quite shiny; elytra black, with a variable, oblique yellowish cloud at basal third which is sometimes small and isolated from suture, or large and reaching from suture to side, with a larger, similarly colored macula usually occupying most of caudal third; pronotum black with apex yellowish; head black; antennae yellow, clubs infuscate; legs yellow or brownish yellow; lower surface fuscous to black; dorsal setae pale.

Head not concealed from above by pronotum; distinctly convex dorsally and laterally in both sexes, finely alutaceous, shiny, finely and densely punctate, punctures separated by about breadth of their diameters, each puncture bearing a minute seta that projects but slightly from puncture; fore legs with only slightly developed flanges on either side in both sexes, not at all distinctly toothed. Antennae with body of first segment about twice as long as broad, about twice as long as 2, 2 about one fourth longer than broad or as broad as long, two thirds as long as 3, 3 almost three times as long as broad, as long as 4 plus 5, 4 almost as long as 5 plus 6, 5 to 7 successively shorter and more transverse; club with segment 11 about three fourths to fully as long as 9 plus 10, 9 and 10 each broader than long. Prothorax distinctly broader than long (3.7: 3), base slightly sinuous, appearing distinctly angulate at hind corners above, but slightly arcuate on sides from base· to apex, lateral carinae broadly exposed throughout their lengths from above, apex broadly rounded, not upturned, nor toothed, nor otherwise modified in either sex; lateral carina slightly arcuate, hind angles obviously angulate, obtuse, but forming only slightly more than right angles, fore corners visible from above, distinctly angulate, rather similar to hind angles; dorsum shiny, densely, finely, distinctly punctate, punctures separated by interstices equal to or narrower than their diameters and bearing flecklike setae that project but slightly beyond sides of punctures. Elytra two thirds as broad as long, twice as long as prothorax, very slightly arcuate on sides, almost parallel in basal two thirds, thence broadly rounded to apex; lateral margin visible throughout its length from above, angulately rounded at base; dorsum shiny, puncturation dense throughout and similar to that of pronotum; setae speck-like, hardly protruding from punctures. Wings fully developed. Legs with femora and tibiae finely reticulate, finely and sparsely setose. Stermmi coarsely reticulate, evidently at most obscurely punctate; intercoxal process of prosternum slightly more than one half as broad as transverse chord of a coxa (4: 7), broadly convex transversely, not carinate and slightly but conspicuously protruding forward beyond apex of prosternum, thus making anterior margin of prosternum concave on either side of middle; mesocoxae separated by only about half as far as fore coxae; metacoxae somewhat more widely separated than mesocoxae; metasternum as long along median line as ventrite 1 plus half of 2. Venter obscurely punctate, reticulate, finely se'tose; ventrite 1 evidently not modified in male. Length, 1.75-2.3 mm.; breadth, 0.75- 0.1 mm.

Holotype female, in Bishop Museum, and six paratypes taken from a dead branch of breadfruit at Piti, Oct. 5, 1936, and two paratypes "ex dead small leaf ficus" at Yigo, Oct. 18, 1936. All the specimens were collected by Mr. Swezey.

I could find no external differences on a specimen I assume to be a male to separate it from the females other than the fact that the first ventrite seemed to have some longer setae toward the middle. None of the specimens have a trace of a median tubercle on the first ventrite.

To the unaided eyes, most of the specimens appear quite black, but some of them are obscurely or distinctly bicolored.

This species somewhat resembles Cis collenettei Blair from southeastern Polynesia. It differs from that species in that it is smaller, narrower, more parallel-sided, has the sides of the prothorax straighter and the side margins more strongly developed, has more definite puncturation, and has the elytra clouded with yellow instead of being concolorous.

Figures

FIGURE 1.-Details of Ciidae. a, outline of head and pronotum of Ceracis palaccps, female; b, the same of the male; c, the same of Cis quadridentatits; d, the same of Cis guamae; e, diagram of elytral markings of Cis quadridentatits; f, outline of head and pronotum of Cis agariconae; g and h, dorsal outlines of the front margins of the heads of the male and female of Ceracis palaceps; i, the same of Cis quadridentatus; j, fore leg of male of Ceracis palaceps.