•3T2 APPENDIX C. — INSECTS. 



Anabrus, Hald. 



This new generic name is derived from the Greek ahros, with 

 the negative prefix an, in allusion to the unprepossessing appear- 

 ance 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 antennae, the narrow sternum, and the po- 

 sition and probably the form of the feet. It has, however, a dis- 

 tinct selliform pronotum extending over the basal articulation of 

 the abdomen, and concealing rudimentary elytra. Excepting the 

 tarsi, the posterior feet resemble those of a Phalangopsis 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 angular, 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 Yalley 

 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 aS'. talpa, which 

 my brother has brought from Jalapa. The tibial springs of S, 

 fuscus are well developed, a character by which the adult of 



