THE CANADIAN ENTOMOLOGIST. 4l9 



for the author states that it is smaller than imdulata, shorter and rounder, 

 more finely punctate, the elytra with a straight pale margin for two-thirds, 

 a discal spot much nearer the base even than in that species and a 

 triangular subapical spot. LeConte stated that it was a synonym of 

 lateralis, but that is even more unlikely. 



H. Octavia, n. sp. — Form nearly as in undulata but sensibly more 



broadly oval, more polished, deep black ; head and pronotum {^ , ? ) 

 almost similar, the latter more transverse ; elytra more sparsely but more 

 coarsely punctate, the punctures more impressed, each with three rather 

 small and rounded, widely separated yellow spots along the sides, and one, 

 discal and rounded, evidently before the middle. Length, 2.25-2.5 mm.; 

 width, 1. 6-1. 8 mm. Mississippi (Vicksburg). 



Related to undulata but differing in its more polished surface, 

 coarser punctures, small, rounded, widely separated marginal spots, which 

 never have any tendency to coalesce, in having the outer limit of the 

 post-coxal arcs more distant from the abdominal side margin and the 

 greater part of the mes-episterna pale in colour in the male, and not black 

 throughout as in the male oi widulata. 



H. filiola, n. sp. — Elongate-oval, only moderately convex, obtuse 

 before and behind, black, rather shining, the head alutaceous, the 

 punctures rather strong and impressed but only moderately close-set; head 

 and pronotum black throughout ( 9 ) ; elytra with yellow side margin 

 subequally wide throughout, bisinuate within, the apical part but little 

 dilated, receding from the edge, nearly attaining the suture, and making 

 an angle of about 100° with the part before it; each also with an elongate 

 yellow spot, rather small in size, extending from three-sevenths to three- 

 fifths of the length, and from inner two-sevenths not quite to the median 

 line ; under surface blackish, the tibi?e and tarsi paler. Length, 2.1 mm.; 

 width, I.I mm. Arizona (Nogales), Nunenmacher. 



This small but distinct species may be placed ntdiX paludicola. 



H. revocans, n. sp. — Very small, rather broadly oval, broadly obtuse 

 behind, shining, black, wholly glabrous; head and sides and apex of the 

 pronotum rather broadly yellow ( ^^ ), the latter finely punctulate ; elytra 

 virtually impunctate, the punctures very minute, only visible under high 

 power, the side margins from base to apical third, moderately sinuate 

 within, and on each a large subapical transversely oval spot and a broad 

 discal vitta, somewhat sinuate on each of its sides, from the scutellum 



