140 GKO. H. HORN, M. D. 



MICROSCHATIA Sol. 



From the time certain specimens collected in the Peninsula of 

 California were referred to M. punctata Sol. there has been doubt as 

 to the correctness of the identification, although the figure given by 

 Solier represents our specimens more nearly than punctata; both 

 species have a depression at the middle of the base of the thorax 

 not shown in the figure. Having, through the kindness of Mr. 

 Champion, examined a true punctata, the following notes have been 

 prepared to show the relationship of the species : 



Thorax narrower at base than at middle, the hind angles not overlapping the 

 humeri. 

 Proplenrse quite smooth ; met-episterna distinctly longer than wide. 



Prosteruum broad, the apex broad and truncate; epipleurse not well defined. 



punctKta. 

 Presternum rather narrow, the apex acutely oval ; epipleuras well defined. 



ChsKiiipioni. 

 PropleursB sparsely coarsely punctate; met-episterna nearly one-half longer 

 than wide. 



Presternum broad, very obtuse at apex ; epipleurse well defined polita. 



Propleurse coarsely granulate ; met-episterna nearly as wide as long. 



Prosternum moderately wide, apex oval, and sometimes subacute; epipleurse 



well defined iiisequalis. 



Thorax widest at base, or very little narrower than at naiddle, the hind angles 

 slightly prolonged over the humeri. 

 Propleurffi sparsely granulate ; met-episterna very little longer than wide. 

 Prosteruum moderately broad, the apex obtusely oval or subtruncate; epi- 



pleurffi well defined morata. 



Propleurse punctate ; met-episterna slightly longer than wide. 

 Prosternum moderately broad, apex truncate; epipleurse well defined. 



sulcipeiiiiis. 

 Propleurse smooth ; mst episterna a little longer than wide. 

 Prosternum broad and truncate, the apex slightly impressed at middle; epi- 

 pleurse not well defined robusta. 



M. punctata Sol., Ann. Fr. v, p. 475, pi. 11, fig. 22. — In this species the 

 sides of the thorax are regularly arcuate without sinuation, the hind angles dis- 

 tinct, but not prominent ; the disc is coarsely sparsely and irregularly punctate, 

 and with a depression at middle of the base. The elytral sculpture consists of 

 coarse punctures arranged in irregular rows, the intervals elevated forming a 

 reticulation, in some varieties there is a tendency in the disc to become subcos- 

 tate, in which case the general sculpture somewhat approaches that of Asida 

 sordida. The prosternum is coarsely cribrately punctured at the sides, broad 

 between the coxse, the apex broadly truncate. The met-episterna are scarcely 

 longer than wide; epipleurse not distinctly limited. Length .60 inch. ; 15 mm. 



The specimens examined are from Zimapan, State of Hidalgo, 

 Mexico. 



M. Cliainpioiii n. sp. ; punctata J Horn., Eev. Teneb. Trans. Am. Philos. 

 Soc. xiv, 1870, p. 282. — Oblong, of the same general outline as Asida sordida, but 

 less convex, black, shining. Thorax broader than long, narrowest at apex, sides 

 arcuate, with a slight sinuation near the hind angles, these latter acute, not 



