. Bulletin - United States National Museum. Science. Fig. 276.—Livoneca ovALis. Abdomen. Body ovate, about one and two-thirds times longer tlian wide, 13 mm.: 21 mm. Head as wide as long, 3 mm.: 3 mm., narrower anteriorly than pos- teriorly with the frontal margin widel}^ rounded. E3'es small, indis- tinct and situated in the post-lateral angles of the head. Posterior margin of head rounded. The Urst pair of antennae are composed 'of six to seven articles, and extend to the antero-lateral angles of the first thoracic segment, l)ut not to the posterior margin of the head; they are separated in
. Bulletin - United States National Museum. Science. Fig. 276.—Livoneca ovALis. Abdomen. Body ovate, about one and two-thirds times longer tlian wide, 13 mm.: 21 mm. Head as wide as long, 3 mm.: 3 mm., narrower anteriorly than pos- teriorly with the frontal margin widel}^ rounded. E3'es small, indis- tinct and situated in the post-lateral angles of the head. Posterior margin of head rounded. The Urst pair of antennae are composed 'of six to seven articles, and extend to the antero-lateral angles of the first thoracic segment, l)ut not to the posterior margin of the head; they are separated in front by a distance equal to 1 mm. The second pair of antenna' are composed of eight to nine articles and extend to the posterior margin of the head. The maxillipeds have a palp of two articles. The first live segments of the thorax are subequal, each being about 2 mm. in length. The sixth and seventh are subequal, each being a little shorter than any of the preceding segments, and each about 1^ mm. long. The epimera are distinctly separated on all the segments with the ex- ception of the first; they occupy the entire lateral margin in the second, third, fourth, and fifth segments. In the sixth and seventh segments the posterior extremities are produced beyond the pos- terior margins of the segments, a distance of 1 mm. in the seventh seg- ment. All six segments of the abdomen are distinct. The abdomen is not im- mersed or set in the tho- rax, and is not a])ruptly narrower than the thorax, the first segment of the abdomen l)eing as wide as the seventh thoracic segment. The seg- ments gradually decrease in width. The sixth or terminal segment is rounded posteriorl3^ Ft is 4^ mm. long and 5 mm. wide at the base. The uropoda do not reach the extremity of the terminal abdominal. Fig. 277.—Livoneca ovalis. a, Maxillipei>. x 27}. 6, Man- dible. X 27j. c, Second maxilla, x 51|. d, First max- illa. X 27y. e, Seventh Please note that these images are extracted from scanned
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
