24 
PSYCHE 
[April 
from all others by the deeply cmarginate hind tiliiae and nearly flat elytral inter- 
spaces. The hind tarsi decrease notably in width from base to apex the basal joint 
being almost twice as wide as the apical one. Slight individual differences in the 
hind tarsi have been noticed in other species and 1 suspect these to be sexual, there 
being a temlency in the less robust sjx'cimens — presumably males — toward more 
slender tarsi, with the joints of more uniform width. 
(Ihire.ns phocnicin n. sp. 
Similar in form to mcndira and cconfnin-, entirely rufotestaceous. Mandibles 
strongly obtusely toothed externally. Head very faintly and sparsely tuberculate, 
smooth behind. Ejhstoma broadly sinuate. Prf)thorax without apical groove or 
discal imj)ressions, the median groove barely perceptible. Elytral costae feeble to 
moderate, strial punctures usually ol)scure, Imt better marked in some specimens. 
Outer apical angle of middle tibiae strongly produced; hind tibiae feebly sinuate 
before the apex. Length 3-4 mm. 
Phoenix, Arizona. Several examples sent Iw Mr. Euchs. Intermediate in 
size between ernMata and the smaller mrndira and indurta. The elytral costae are 
distinct enough though less sharply defined than in the smaller species. Phocnicis 
differs from all others in the strongly produced outer apical angle of the middle 
tibiae, and in the strong lobe like tooth of the outer margin of the mandibles, which 
structure is, however, foreshadowed in fcostata. 
(1. mcndica Horn. 
(i. indurta Hcjrn. 
These two speeies are mutually very closely related and the small differences of 
sculpture are easily obscured by the indument with which they are frecpiently coated. 
Mendica is the less robust of the two, the difference being cjuite obvious when series 
are compared; the apical marginal groove of the pronotum is well defined, the 
medial groove deeper, and there are two more or less evident discal impressions 
before the middle. In indurta the thoracic sculpture is generally less jironounced, 
the apical groove beconung obliterated at middle, the medial sulcus is fainter, anil 
the discal impressions are lacking. The elytral costae are normally quite strong in 
both, but are rather better develojied in indurta instead of in mrndira as stated by 
Horn. Both species are smaller than crostata or phneniris, ranging in length from 
2.8 to 3.6 mm., the Latter measurement applying to an unusually robust sjx'cimen. 
In neither species is the outer margin of the mandibles more than very faintly sinuate, 
nor do cither exhibit the tibia! modifications posse.ssed by the two new forms. 
