AMERICAN COLEOPTERA. 103 



The following remains unknown : 



S. calirorniciis Motsch.— Subovatus, convexus, nigro-castaneus, glabor, 

 ore, antennis pedibusque anteriores testaceis, pedibus posteriores nigro-fuscis; 

 femoribus incrassatis. Long. IJ lin. 



Occurs in California. 



HELODES Latr. 

 Head deflexed, usually concealed from above by the prolonged 

 thorax, without frontal suture, beneath without subocular ridge. 

 Eyes round, moderately prominent. Mouth parts as in Microcara. 

 Antennae slender. Prosternum very short before the coxse and not 

 prolonged between them, the coxae prominent and contiguous. Middle 

 coxae moderately prominent and contiguous. Metasternum short. 

 Posterior coxae suddenly dilated within and contiguous at middle. 

 Legs moderate. Tibiae with distinct terminal spurs, the posterior 

 margin flattened. Tarsi flattened and bicarinate above, first joint as 

 long as the rest uaited, second less than half the first and prolonged 

 above in two dentiform processes which nearly conceal the very small 

 third joint beneath, fourth longer than the third and subbilobed, fifth 

 rather short. Claws simple. (PI. I, fig. 1-4). 



In most of the species of this genus the thorax is prolonged 

 in front as in Sact'um, and entirely conceals the head. The struc- 

 ture of the tarsi distinguishes it from all the other genera of the 

 tribe. 



Our species are as follows: 

 Form oblong, more than twice as wide as long. 



Thorax subtruncate in front, the margin not reflexed apicalis. 



Thorax prolonged in front, nearly semicircular in outline, the apical 



margin slightly reflexed maculicollis. 



Form oval or broadly ovate. Thorax prolonged in front. 

 Oval, longer than broad. 



Elytra yellow with two black spots on each pulchella. 



Elytra entirely black ftiscipenuis. 



Broadly ovate, nearly as broad as long. 



Elytra entirely black thoracica. 



The species all agree in the structure of the antennje. The first 

 joint is oval, second round scarcely as large as half the first, third 

 minute, fourth as long as the preceding three, 5—11 equal, a little 

 shorter than the fourth. The posterior femora are stouter than in 

 Ci/phon or Microcara but not saltatoriul as in Scirtes, although the 

 present genus is a very natural intermediate between the two former 

 and the latter, not only in this character but also in the presence of 

 tibial spurs of moderate size. Gueriu also mentions the intermediate 



