390 PROCEEDINGS OF THE NATIONAL MrSEUM. VOL.XX. 



One male, 3 females. Los Angeles, California, Coquillett (U.S.K.M. 

 Biley collection). 



This species closely resembles the preceding, but is rather slenderer, 

 especially the male, with less pronounced crimson markings, besides 

 the differences noted in the table. 



27. OEDALEONOTUS, new genus. 

 (OtdaXeoS, swollen; r&jroS, back.) 



Body stout, heavy and clumsy. Head large and full, the vertex well 

 arched, raised considerably above the level of the prothorax, the fas- 

 tigium broad, broadly and shallowly sulcate and considerably declivent, 

 the eyes separated rather widely; face nearly vertical: frontal eosta- 

 very broad, subequal, nearly plane, percurrent but sometimes obscure 

 basally; eyes rather large, not very prominent, broadly ovate, with a 

 slight production above anteriorly; antennae not slender, uniform,, 

 slightly longer (male) or slightly shorter (female) than head and pronotum 

 together. Pronotum short and stout, enlarging posteriorly only by the 

 slight flare of the metazoua, with vertical though slightly tumid lateral 

 lobes, more or less flaring on the metazona below, separated from the 

 dorsum by more or less pronounced, coarse, rounded rugae, generally 

 interrupted on the posterior portion of the prozona, the median carina 

 interrupted between the sulci; disk of prozona distinctly tutnid, but 

 little longer than the metazona, from which it is separated by a very 

 deep sulcus, its own posterior transverse sulci deeply impressed,, 

 approximate, and subparallel, the anterior submarginal sulcus also very 

 distinct, the margin being elevated to receive the head ; metazona plane, 

 punctato-rugulose, very obtusely augulate behind, the border inargi- 

 nate. Prosternal spine short, conical, blunt; ineso- and metastethia 

 together distinctly longer than broad in both sexes, the mesosternal 

 lobes a little longer than broad in both sexes, the metasternal lobes 

 subattingent in the male, slightly distant in the female, the space 

 behind the latter laterally elongate, extending forward to the coxae. 

 Tegmina fully developed or abbreviate, rarely shorter than the prono- 

 tum and then but slightly. Hind femora stout, heavy, and tumid, the 

 inferior genicular lobe pallid, immaculate. Abdomen of female with 

 abbreviated terminal segments (recalling Bradynotes) and partially 

 exserted ovipositor; of male not enlarged at the extremity and scarcely 

 elevated, terminating roundly and bluntly, the last ventral segment (in 

 advance of the subgenital plate) scarcely longer than the penultimate j 

 subgeiiital plate of male very brief and subequal, its lateral margins 

 distinctly ampliate at the base and entire apically, with no tubercle; 

 cerci tumid and enlarged at base, suddenly contracted, and terminating 

 in a slender posterior process. 



This genus is quickly separated from those in its immediate vicinity 

 by the tumidity of the prozona, and the clumsy form, which give it a 

 very distinct appearance. 



