Campylomma brunneicollis, Usinger, 1946

Usinger, Robert L., 1946, Hemiptera Heteroptera of Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum, Bulletin 189, pp. 11-103 : 90

84. Campylomma brunneicollis , new species ( fig. 24 , c).

Oval, more or less extensively brown colored with short pubescence at middle of head and long, subappressed pubescence elsewhere.

Head nearly half again as broad as long, 24: 17, the anteocular portion very short, scarcely more than one third as long as an eye, 5: 11 in the male, 4: 11 in the female; eyes a little over half as wide as interocular space in the male, 6.5: 11; half as wide in the female, 6: 12. Disk with longer hairs anteriorly and long, stiff hairs near posterior margin, the middle with very short hairs; relatively smooth anteriorly and with a few punctures near hind margin, the entire disk shining. Rostrum reaching or slightly surpassing apices of hind coxae. Antennae as long as head, pronotum and scutellum together, the second segment much shorter than width of head, 20: 24 in the male, 18: 24 in the female; proportion of segments 5: 20: 12: 8 in the male.

Pronotum shorter than head on median line, 15: 17, over twice as broad as long, 33:15; disk obscurely punctate-rugose, not impressed or elevated near the callosities. Pubescence quite even and dense over entire disk. Scutellum, clavus, corium, and cuneus with somewhat longer, sparser, and more irregular pubes~ence.

Color predominantly dark brown on head and pronotum, the under surface of head and a band across hind margin of vertex ochraceous. Pronotum sometimes lighter brown anteriorly at middle. Eyes red or brown, antennae pale, rostrum pale with black apex, scutellum pale, ochraceous, more or less brown basally at middle. Clavus and base of corium white, apical half of corium more or less generally infuscated, especially on inner portion. Cuneus pale, hyaline. Membrane lightly embrowned medially. Under surface pale marked with brown on pro and mesopleura and laterally and apically on abdomen. Legs testaceous, the front and middle femora each with a subapical spot postero-ventrally and middle femora each with three spots along antero-ventral side in apical half and one subapical spot antero-dorsally, all but the basal of these spots setigerous. Hind femora with 11 prominent black spots in apical half and with the entire apical half sometimes lightly infuscated. Tibiae with long black spines, most of which arise from black spots.

Size: male, length ' 2.3 mm., width (hemelytra) 1 mm.; female, length 2.7 mm., width (hemelytra) 1.1 mm.

Holotype male, allotype female, and two paratypes, Mt. Tenjo , May 3, on Scaevola koenigii, Usinger ; five paratypes, Mt. Alifan , May 21, on milkweed, Usinger ; one paratype, Inarajan , May 7, Usinger , and one, Piti, April 30, Usinger.

The variation in color in this series is remarkable, one of the Mt. Alifan males having an entirely brown head except for the characteristic ochraceous base, entirely light brown scutellum, the clavus and corium brown except narrowly at base, and even the cuneus infuscated except basally and laterally. The under surfaces of thorax and abdomen are entirely brown, the hind femora are entirely brown except for pale bases and apices, thus nearly obscuring the slightly darker black spots, and the antennae are pale but vaguely infuscated. Other specimens from Alifan appear to be perfectly typical, so I assume that this represents an extreme form of color variation. In some specimens the rostrum scarcely exceeds the apices of middle coxae but the condition of the specimen determines whether the rostrum is fully extended or not. I know of no close relatives of this distinctive species.

Figures

FIGURE 24.-Campylomma species, hind leg showing size and arrangement of spots and bristles on femur: a, breviceps; b, pallida; c, brimneicollis.