On the Hymenopterous Genus Harpagocryptus and its Allies

Psyche: A Journal of Entomology, Sep 2018

Charles T. Brues

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On the Hymenopterous Genus Harpagocryptus and its Allies

International Journal of ON THE HYMENOPTEROUS GENUS HARPAGOCRYP- TUS AND ITS ALLIES. BY CHARLES T. BRUES. In the October issue of the Proceedings of the Hawaiian Entomological Society for 1908 Bridwell ('08) described a peculiar genus of Hymenoptera from Queensland, which he named Harpagocryptus and placed in the Family Dryinide. Harpagocryptus differs from all other genera of Dryinide except Dryinopsis Brues ('10)2 in having the antennm of the female 12-jointed, but Bridwell was influenced in placing the genus in this family by the habits of the larva which forms a sac on the side of the abdomen of crickets after the fashion of certain well known Dryinids. - [June Still a fourth member of this group is Olixon Cameron (’87) described from Panama and later redescribed by Kieffer (’11) from Mexico, as Saphobethylus. Turner and Waterston (’17) have shown these two genera to be complete synonyms as the type species of both are identical. Cmeron regarded Olixon as an anomalous Brconid, but thought that it showed resemblance to certain Bethylids, particularly on account of its greatly thickened fore legs. Kieffer placed Saphobethylus in the Bethylidm without question, but Turner and Waterston hve referred the insect to the Rhopalosomatidee. All four gener are closely related, but are, I think, undoubtedly separable on good characters. They my be distinguished by means of the following key, which is based solely on the females, except in the cse of Olixon. 1. Second segment of abdomen much the longest 2 Second segment of bdomen only little longer than third, head transverse, vestigial wings present, reaching to bse of abdomen, but without nervure; tarsal clws with smll subapical tooth...Olixon Cmeron. 2. Tegulm well developed; anterior wings present, but reduced in size and reaching to the tip of the propodeum; antennae much longer thn the head and thorax together, slender 3 Tegulm and wings absent; ntennm stout, brely as long as the hed and thorax Al,oa Brues 3. Mndible with long apical tooth and with three minute subapical teeth on the inner edge; head seen from above transverse Harpaocryptus Bridwell Mndible with long pical tooth, the inner teeth large and well-developed; head seen from above as long as broad Nea|oa gen. nov. Of the three genera, Algo and Nealgo re distinguished by number of characters which are indicated in the generic diagnoses that follow; likewise Algoa and Harpagocryptus are separable by several clear-cut structural differences. Harpagocryptus and Nealgoa are evidently more closely similar, although many characters which might be useful are not given by Bridwell, and were it not for the great geographical separation, I should hesitate to propose a new genus for the North American species. The characters which appear useful in differentiating the four genera follow. Olixon Cameron. c. Head transverse, wider than the thorax. Antennae a little shorter than the body; first joint of flagellum one-half longer than second, all flagellar joints long, at least four times as long as thick; antennm inserted below the lower margin of the eyes; malar space with a black carina connecting the eye and mandible; cheeks half as long as the eye. Mandibles curved, pointed and without tooth. Eyes almost attaining the posterior margin of the head. Prothorax a little longer than wide, bulging laterally in front. Anterior wing reaching to the base of the abdomen, without venation or stigma. Propodeum as long as the prothorax, its hind angles acutely toothed. Tarsal claws with a small tooth near tip. Third segment of abdomen a little shorter than the first. External genitalia consisting of a median styler between a pair of parallel, upturned, filiform projections. Harpagocryptus Bridwell. Proc. Hawaiian Entom. Soc., vol. 2, pp. 34 (1908). 9. Head transverse, wider than the thorax, occiput arcua.tely emarginate. Antennm elongate, slender, much longer than the head and thorax together; second and following joints of antennm subequally elongate, many times as long as thick; first joint shorter than second; pedicel very short, but evidently longer than wide. Mandibles with a long apical tooth and three [June minute subapical teeth on the edge. Prothorax large and long, narrowed posteriorly; tegulee present; fore wings strap-like, reaching to the posterior face of the propodeum; propodeum very long, its superior angles produced into a strong acute tooth on each side. AlCoa Brues. Journ. New York Entom. Soc., vol. 18, p. 18 (1910) 9. Head quadrate, not broader than long, occiput faintly emarginate. Antennm short, barely as long as the head and thorax together; first flagellar joint longer than the second; second and following barely three times as long as thick; pedicel twice as long as thick and more than half as long as the first flagellar joint; antennae inserted just above the level of the lower margin of the eyes. Malar space with a sharp furrow, shorter than the basal width of the mundible. Mandibl (...truncated)


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Charles T. Brues. On the Hymenopterous Genus Harpagocryptus and its Allies, Psyche: A Journal of Entomology, 29, DOI: 10.1155/1922/57042