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Show 372 APPENDIX C.- INSECTS. ANABRUS, Hald. This new generic name is derived from the Greek abroi, with the negative prefix an, in allusion to the unprepossessing appearance of the insect. This genus has broad articulate tarsi, the soles concave, and the third articulation cordate. It resembles Pha-langopsis in general appearance, the form of the head and labrum, the high position of the antennas, the narrow sternum, and the position and probably the form of the feet. It has, however, a distinct selliform pronotum extending over the basal articulation of the abdomen, and concealing rudimentary elytra. Excepting the tarsi, the posterior feet resemble those of a Phalangopsu and have the spines distributed in the same manner. The ovipositor is nearly straight, sword- shaped, unlike that of Phalangopsis, and it is two- thirds the length of the body. A single specimen was brought from the Valley of the Great Salt Lake, and of this the antennae, palpi, and anterior and medial feet are wanting. ANABRUS SIMPLEX, Hald. PL. X. FIG. 4. Dark shining brown, posterior femora with an external and internal row of small spines beneath upon the posterior extremity; tibiae aqgular, with a row of spines upon each side above, and two approximate rows beneath with the spines alternating. Length fifteen lines, pronotum six, ovipositor twelve, posterior femora and tibiae, each eleven, and tarsi three and a- half. This seems to be one of the species which is eaten by the aborigines of the Valley of the Great Salt Lake. STENOPELMATUS FUSCUS, Hald. Shining dark brown, abdomen darker. One specimen, seven lines long, is from Santa F£; another is eight lines long, and from Chihuahua: the latter has the labrum and tibiae darker than the general colour. It is possible that these small specimens may be immature, and they would not have been characterized but for the fact that in the allied genera the colour remains remarkably uniform during the various transformations, which renders it probable that they are not the larvae of the rufo- testaceous Mexican S. talpa, which ray brother has brought from Jalapa. The tibial springs of S. fuscu$ are well developed, a character by which the adult of |