180 GEO. H. HORN. M. D. 



The male antennae are one and a third times the length of the body. 

 The prosternum is cribrately punctured in a depressed space over its 

 entire surface except a narrow space in front and between the coxae. 



Of this species I have two male specimens taken in different years 

 and both the same color which might be supposed to be an indication of 

 immaturity. The species is, however, distinct from the others by the 

 much more • coarsely punctured thorax and the sexual characters of the 

 presternum. 



Two specimens, Utah. 



Bibliography. 



S. notatus Oliv. (Callid.) Ent. iv, 70,p. 61, pi. 7, fig. 89. 

 deflendum Newm. (Elaph.) Entomologist p. 6 and 30. 

 S. lugens Lee. Proc. Acad. 1862, p. 41. 

 S. novatus n. sp. {cribnpennis Check Li^t.) 

 S. lepidus n. sp., S. dolosus n. sp., S. debilis n. sp.. supra. 



<S. sobrius Newm. (Elaph.) described erroneously from the United States is 

 abundant at San Luis Potosi, Mex., and should not be included in our lists. 



ACM.KOPS Lee. 



.4. viola Lee. Proe. Acad. 1860, p. .321. 



This species is mentioned to note its accidental omission from among 

 the species in the table given by Dr. LeConte (New Species, 187"-5, p. 

 209). 



The form is robust and similar to tumida. The color violet-blue, legs 

 and antennae black, surface clothed with short black erect hair. The 

 elytra are more densely punctate and the thorax rather less so than in 

 tumida. In the latter species the pubescence is longer and not stiff, 

 yellowish in color. 



A. tumida is abundant in Oregon and northern California, while viola 

 belongs to the central regions of the latter State. 



9IONII.RIVI.4 Say. 



The descriptions of our species of Monilema are so widely scattered, 

 and for the most part very incomplete, that it has seemed to me proper 

 to present a new study based on a larger aggregate of material than has 

 been heretofore accessible. 



The characters heretofore used in the separation of the species seemed 

 very superficial and variable, and the very distinct appearance of most of 

 the species gave good grounds for suspecting other characters of a more 

 permanent nature. 



