OCR Text |
Show 1877.] COLLECTION MADE BY H.M.S. ' PETEREL.' 83 1. CAMPONOTUS SENEX, Smith, Cat. Hymenopt. part vi. p. 47. From Charles Island (W. E. Cookson). 2. CAMPONOTUS PLANUS. Worker. Length, 1|- line. Black, with the legs, antennae, and mandibles ferruginous; thinly sprinkled with pale glittering hairs. Head slightly shining, oblong, a little wider than the thorax, with the eyes prominent and situated high at the sides near the vertex. Thorax rounded anteriorly, flattened above, and gradually narrowed to the metathorax, which is truncate behind ; the sutures dividing the pro-, meso-, and metathorax only slightly impressed. Abdomen ovate, semiopaque; the node of the petiole incrassate, narrow, the sides nearly parallel, rounded above. Charles Island (C. Darwin). 3. CAMPONOTUS MACILENTUS. Worker. Length, 2\ lines. Pale ferruginous, with the legs pale testaceous, smooth and shining, and having a few erect scattered pale hairs. The head wider than the thorax, oblong, with the eyes large, ovate, and black; the vertex slightly emarginate behind. Thorax compressed and much narrowed behind, convex above. Abdomen wider than the head, and oblong-ovate. The scale of the petiole wedge-shaped and rounded above. Charles Island (G. Darwin). 4. AGRIOMYIA VAGANS. Female. Length 2 lines. Head and thorax rufo-piceous ; abdomen pale ferruginous, smooth and shining. Head oblong, the vertex rounded behind; the mandibles and antennae paler than the head. Thorax a little longer than the head, deeply strangulated between the pro- and metathorax; the former rounded in front and very convex; the metathorax abruptly truncated obliquely ; the legs rufo-piceous, with the tarsi and the articulations pale testaceous; the tibiae paler than the femora and spinose exteriorly. Abdomen oblong, cylindric, and one third longer than the head and thorax, mottled with dark rufo-piceous stains ; the second segment with three or four transverse impressed lines; the apex acute. On comparing this insect with females of the different genera into which the genus Thynnus has been divided, it appears from its general structure to belong to the genus Agriomyia of Gue'rin. Charles Island (C. Darwin). 5. XYLOCOPA MORDAX, Smith, Trans. Ent. Soc. Lond. 1874, p. 294, 2 • Male. Length 8 lines. Ochraceous, the ocelli and mandibles black, the latter with a yellow spot at their base; the clypeus with a rufo-fuscous longitudinal line in the middle ; the antennae fuscous above ; the pubescence fulvous. The mesothorax smooth and shining on the disk, as is also the scutellum ; both nearly impunctate, having only a few very fine punctures: the mesothorax blackish on each 6* |