102 GEO. H. HORN, M. D. 



The following table gives in brief the striking characters of our species : 



Elytra acute, sometimes acuminate at tip; first joint of posterior tarsi equalling 



the next three in length 2. 



Elytra obtuse at tip or rounded; first joint of posterior tarsi not longer than the 



next two 4. 



2. — Head and thorax with smooth facets 1. miranda Lee. 



Head and thorax equally jjunctured without facets ?>. 



3. — Front sparsely punctured 2. nolata Lap. 



Front equally densely punctured. 



Sides of thorax regularly arcuate, the disc widest at middle. 



5. al i*o purpurea Say. 

 Sides of thorax oblique posteriorly, the disc widest in front of middle. 



4. longipes Say. 



4. — Thorax punctulate over its entire surface; elytra not costulate 5. 



Thorax transversely strigose at middle; elytra finely costulate. 



6. Drummondi Kby. 

 5. — Form depressed as in notata ; thorax also similarly sculptured. 



3. con sputa Lee. 

 Form convex ; thorax coarsely punctured. 



Margin of thorax entire or nearly so '. 8. gentilis Lee. 



Margin of thorax obliterated in front. 

 Tip of presternum suddenly constricted. 



Hind angles of thorax obtuse not flattened; clypeus not emarginate; 



elytra not pubescent 7. fulvoguttata Harr. 



Hind angles of thorax acute, flattened above and with a slight smooth 

 space; clypeus narrowly semicircularly emarginate; elytra pubes- 

 cent 9. intrusa n. sp. 



Tip of presternum of triangular form. 



Sides of thorax feebly arcuate, the disc and sides equally punctured. 



10. reneola Mels. 



Sides of thorax distinctly arcuate, the disc posteriorly, also the sutural 



region of the elytra less densely punctured 11. obtlisa n. sp. 



M. miranda Lee. — Head coarsely punctured, with five smooth callosities 

 arranged in a regular pentagon. Thorax with sides regularly arcuate, lateral 

 margin acute posteriorly, disc coarsely punctured with seven smooth spaces, three 

 on each side oval, one in the median line posteriorly : beneath coarsely punctured, 

 a smooth space along the lateral margin, presternum at middle very sparsely 

 punctate, the tip rather suddenly narrowed. Elytra not very densely punctured, 

 the punctures comparatively' fine, the surface with very regular markings as shown 

 in the figure, the margin posteriorly' finely serrulate, the tip acuminate. Body 

 beneath coarsely punctured. First joint of posterior tarsi as long as the next three. 

 Length .54— .64 inch; 13.5—16 mm. (PI. IV, fig. 1). 



In both sexes the last ventral segment is truncate, the angles acute 

 and prominent. 



The elytral markings of this species are the most complete and perfect 

 of any in the genus, it is the full development of which the markings of 

 the other species are the derivatives in a more or less imperfect manner. 

 In notata and consputa there is a very plain attempt at a reproduction 



