HEMIPTERA. VAN DUZEE. 45 
taining the hind margin a little exterior to those of the mesonotum. 
Macropterous elytra a little shorter than those of tricarinaia. Male 
Styles divergent and curved, tapering gradually from base to near 
he apex where they are abruptly bent and narrowed to an acute 
point, the points meeting above an ovate opening. Anal tube with- 
out ventral prolongations on either side. Tibial spur narrower 
than in tricarinata, scarcely more than half the length of the first 
tarsal joint. 
Color variable as in tricarinata, in fully matured examples 
testaceous tinged with yellowish on the head, above blackish. Front 
obscurely dotted with pale especially toward its base; vertex im- 
maculate or the caring paler, the eyes anteriorly pale or subcarn- 
eous. Pro- and meso-notum smoky or almost black, the carine 
touched with paler. Tergum dusky either side or at times almost 
black. Elytra smoky becoming nearly black on the base of the 
clavus and the inner base of the corium and on the square stigma; 
costa broadly white, divided into two lobes at the stigma, the basal 
lobe sloping off to the base of the costa, the apical subtriangular, 
occupying about half the rhembrane; nervures concolorous, spar- 
ingly dotted with black; commissural nervure white broadly inter- 
rupted with black on the apex of the clavus. Tips of the tarsal 
claws black. In pale examples the elytral markings become indi- 
stinct. 
Described from numerous examples representing both Sexes, 
taken at Alpine, Mussey’s and Torrey Pines from June to August. 
I have tried to identify this form with nigripennis Crawford but it 
Seems to be entirely distinct. All the carinz are very sharply de- 
fined in this species. The Torrey Pines specimens were taken on 
Biglovia. 
251. Liburnia consimilis Van D. April to June. Abundant along 
water courses. 
252. Liburnia lineatipes Van D. Lakeside, May. 
258. Liburnia occlusa Van D. Lakeside and La Mesa, May to 
June. 
Family CICADIDAE 
254. Proarna crepitans n. sp. 
Allied to mawra, smaller and darker than valvata. Length to 
tip of abdomen 22 mm. to tip of elytra 34 mm., alar expanse 62 mm. 
Male: Head as wide as the anterior lobe of the pronotum; 
front strongly striated, without median sulcus. Sides of pronotum 
Strongly sinuated; humeral angles less produced and more rounded 
than in valvata; anterior lobe more angled. Rostrum reaching 
onto the hind coxee. Opercula large, rounded apically, the sides 
quite strongly sinuated. Last ventral segment long, subtriangular, 
its apex roundedly emarginate; valve shorter than the last ventral 
Segment, ovate, apex somewhat compressed and almost emargin- 
ate, dorsal aspect of the genital segment produced in a prominent 
Subacute tooth, shorter and more angled than in valvata. 
Color black. Vertex with three obscure pale marks on the 
posterior margin, another on the antennal ledge and a transverse 
one on the base of the front superiorly ; front pale or fulvous with 
