CICINDELID.E 13 



Distinguishable at once from californicus by the much more 

 elongate elytra, gradually narrowed basally and without humeri, 

 and, from sculp tilis (mimus), by the very much sparser elytral 

 sculpture. 



Omus semilucens ssp. diminuens nov. Male smaller and slightly more 

 ventricose than in semilucens, the hind body less elongate; lustre rather 

 shining; head scarcely narrower than the prothorax, less coarsely but 

 deeply rugose, the labrum not truncate but with the broad median lobe 

 distinctly produced, with its apex narrowly truncate; antennae rather 

 long, slender; prothorax formed and sculptured as in the preceding but 

 relatively smaller and somewhat less transverse; elytra similarly elongate- 

 oval, widest at the middle and without evident humeri, but only about 

 three-fourths longer than wide and two-fifths wider than the prothorax; 

 punctures still smaller and feebler, widely separated, the fovese small, 

 few in number, not deep and not very conspicuous; anterior tarsi with 

 the three basal joints equal in length, the second not a fourth wider than 

 long. Length (cf ) 13.0 mm. ; width 4.8 mm. California (Leona Heights, 

 Alameda Co.). 



Differs from semilucens in the more lobate labrum, more ventricose 

 and shorter hind body, finer elytral punctures, less distinct fovese 

 and much less transverse second joint of the anterior male tarsi. 



Omus californicus ssp. latipennis nov. Strongly ventricose, the elytra 

 somewhat shining; head much narrower than the prothorax, very coarsely 

 and strongly rugose throughout, the impressions small; labral lobe broadly 

 rounded but distinctly advanced; antennae rather long and slender; pro- 

 thorax obtrapezoidal, the sides converging from apex to base and evenly, 

 feebly arcuate; margin fine, prominent only basally; surface very deeply, 

 vermicularly rugose, rather less deeply along the middle; elytra not one- 

 half longer than wide and nearly two-thirds wider than the prothorax, 

 gradually ogival behind, the sides rapidly rounded at base, the shoulders 

 very pronounced; surface with very moderate, well separated punctures, 

 the foveae small and not very conspicuous; hind tarsi much longer than 

 the tibiae. Length (9) 16.5 mm.; width 6.5 mm. California (Leona 

 Heights, Alameda Co.). 



The elytra are very much broader than in the female of cali- 

 fornicus, less convex, with less coarse and rather more separated 

 punctures and much more pronounced humeri. 



Omus sculptilis ssp. opacipennis nov. Body unusually depressed, with 

 the elytra subopaque, ventricose; head only slightly narrower than the 

 prothorax, coarsely rugose, not punctate medially on the front, the labral 

 lobe broadly, evenly rounded and distinctly advanced; antennae notably 

 long; prothorax wider than long, the sides parallel and but feebly arcuate 

 before the middle, then rounding and converging, becoming straight to 

 the base, the margins reflexed basally; surface strongly vermiculato- 



