Chelonus guamensis, Fullaway, 1946

Fullaway, D. T., 1946, Ichneumonidae, Evaniidae, And Braconidae Of Guam, Insects of Guam II, Honolulu, Hawaii: Bernice P. Bishop Museum, pp. 221-227 : 224-225

2. Chelonus guamensis , new species.

Female 3 mm. long, shining black, basal third of abdomen, legs, antennae, and mandibles brown, the mandibular teeth black, flagellum of the antennae fuscous, as are also the hind coxae, apical half of hind tibiae, and the tarsi; covered with a close microscopic silky pubescence, although the disk of the scutellum and the mesopleurae are, fo1 ·the most part, bare; variously sculptured.

Head transverse, wide as thorax, about twice as wide as long (as viewed from above), eyes oval, convex, hairy, ocelli on the vertex in the form of an obtuse triangle, lateral members less than one diameter apart but removed from eye margins about four, frontovertex twice as wide as long, convex, finely striate, excavated in front for the antenna! scrobes, face only a little wider than long, also striate, clypeus below indicated by a shallow linear impression with pit on either side, antennae attached at top and at about middle distance of eyes, widely separated and not far from eyes, about two thirds length of body, consisting of 16 segments, the basal segment quite stout, following segments filamentous and decreasing in length outwardly, mandibles fairly stout and toothed apically, the width of base much less than that of malar space, genae and postgenae fairly wide, convex, striate, smoothly rounded to occipital margin, which is distinctly carinate, maxillary palpi 5-jointed, labial palpi 3-jointed, white.

Thorax stout, fairly long and deep, pronotum transverse, collarlike, hardly visible from above, mesonotum wider than long, convex above, declivous in front, finely punctuate and in part striate, scutellum triangular, convex, a transverse row of circular pits along the basal margin; metanotum transverse, the anterior and posterior margins of the apical half carinate with a costate groove between, basal half on either side of the scutellum also costate, propodeum about as long as metanotum, flat on top, declivous behind and on the sides, coarsely rugulose.

Abdomen as long as head and thorax combined, corbiculate, elongate oval, the tergum convex, the ventrites basally collapsed against the tergites leaving a hollow cavity, the tergum without indication of segmentation and generally rugoso-striate, ovipositor exserted and about half the length of the abdomen.

Legs fairly long and stout, the hind pair much larger than the fore and middle pairs.

Wings hyaline, stigma large, triangular, more than half as wide as long, with the parastigma, which is quite conspicuous, as long as the metacarp, radial cell not nearly reaching apex of wing, recurrent nervure interstitial with 1st cubital crossvein, 1st cubital and discoidal not separated, subdiscoidal nervure not interstitial but joining the discoidal below the middle of the apical section, nervulus postfurcal.

Sumay Road, July 15, holotype female, Swezey. Type in collection of Experiment Station , Hawaiian Sugar Planters' Association.