COLEOPTERA OF SOUTHERN CALIFORNIA. 247 



the female feebly serrate, not reaching the middle of the elytra. Head 

 with the usual frontal impressions, surface polished, finely, sparsely 

 punctulate. Prothorax slightly longer than wide, widest in front of the 

 middle, sides sinuate before the hind angles, apex a little wider than the 

 base, all the angles rounded; surface polished and sparsely punctulate; 

 pubescence line, semirecumbent, intermixed with longer, erect hairs. 

 Elytra parallel (male), or a little wider behind (female); a little less 

 shining than the prothorax, but with similar pubescence; punctuation 

 sparse and fine; tips obliquely, separately prolonged in the male, broadly 

 rounded in the female, narrowly yellow in both sexes. 

 Length, 3.3-3.6 mm. 



Described from three males and one female from 

 Pasadena, kindly given the writer by Dr. Fenyes, who 

 took them with others by beating. 



The form of the prothorax, and the extravagantly 

 long antennae with branches half as long as the elytral 

 width, render this the most remarkable species of the 

 genus yet discovered in our territory. 



Following is Horn's table enlarged to include the new 

 species here described. This table is perhaps not the 

 best that could be devised, but as a thorough revision 

 of the Malachiini is much needed, it has not been 

 thought advisable to attempt a thorough investigation 

 of the genus at this time. It is quite certain that there 

 are other undescribed species of Malachius in collections. 



Table of Species of Malachius. 



Antennae of male serrate. 



Elytra not appendiciilate in the male. 



Anteunpe with the second joint similar in length and form to the 



third; size large (Atlantic Eegion) Jf . ceiieus. 



Anteunfe with second joint much smaller than the third; greenish 

 black, with small yellow spot at sutural angle in both sexes; 



size small (California) M. biguttulus. 



Elytra appendiculate in the male. 



Tips of elytra not spiniform in the male, the appendix visible from 

 above. 



Thorax with the sides broadly reddish yellow; both it and the 

 elytra, especially toward the base, with numerous erect 

 hairs; elytral tips reddish in the iemale only ...31. auritus. 



