Arytaina variabilis glabrascuta, Caldwell, 1942

Cadwell, J. S., 1942, Psyllidae from Guam, Insects of Guam I, Honolulu, Hawaii: Bernice P. Bishop Museum Bulletin 172, pp. 20-22 : 22

5. Arytaina variabilis glabrascuta , new variety ( fig. 1 ).

General color light tan to dark brown with vertex of lighter shade; four basal antenna! segments lighter than terminal. Apex of forewing with five large dark areas between the veins, the first in the cubital cell and the last almost at apex of pterostigma; a dark spot present at apex of clavus and sometimes a dark spot present on membrane at junction of cubitus and medius. Structurally similar to the species except body is not covered with stiff pubescence; veins lack setae except costa; pterostigma slightly more elongate, and antennae are longer than body without wings. Length to tip of forewing, male 2.7 mm., female 3 mm.; forewing, male 2 mm., female 2.2 mm.

Orote Peninsula, April 9, Bryan , male holotype, female allotype, and paratypes; Umatac, Tumon , Upi Trail , Machanao, Mt. Alifan, Barrigada, from March to July , Bryan , Swezey , paratypes. Umatac, Mar. 28, Bryan ; Magua, Mar. 31, Bryan ; Tiyan, April 2, Bryan ; Orote Peninsula, April 9, Bryan ; Mt. Alifan, April 20, Bryan , June 19, Swezey ; Piti, May 1, Usinger ; Upi Trail, May 5, Usinger ; Tumon, May 30, Swezey ; Machanao, June 4, 30, Swezey and Usinger ; Barrigada, July 6, 22, Swezey . Ninety-five specimens .

This insect was very abundant in Guam, al"':'ays on the ifil tree ( Intsia bijuga ), an important tree of the native forests, though a few stragglers were taken on other trees.

The species variabilis was described from the Philippines by Crawford in 1917, without mention of food plant. It was later recorded from Malay and Borneo. No doubt it also occurs on Intsia bijuga , as this tree grows there also.

Figures

FIGURE 1.-Arytaina variabilis glabrasrnta, new variety: a, forewing of male; b, profile of male genitalia; c, profile of female genitalia.