THE CANADIAN ENTOMOLOGIST. 59 



and with the upper flivous marks occasionally joined along the margin. 

 Length, 5^/^-7 mm. 



Seems close to excelsa Baly (which I have not seen), but that species 

 is said to have the thorax impiinctate and the elytra obsoletely ''elevato- 

 vittatis," and the length is 9^ mm. Curiously enough, the description 

 oi excelsa does not mention the shape of the third antennal joint, except 

 inferentially in the statement, "the fourth cylindrical, not curved." The 

 curved third joint in the $ oi parambaensis is very marked, and allies it 

 closely to the Central American forms, lepida Say and variabilis Jac. It 

 seems to indicate a tendency towards the dilated joint of the ^ of 

 Ceratojna, All the forms in Baly's paper, sec. K, with concave front in 

 the c^ , are represented in my collection, with the exception oi excelsa 

 Baly. The forms imitans Jac. (type in my collection) and deliciosa Baly 

 have a very strong tendency to run together. 



In parambaensis, ihQ entire front is occupied in the ^ by the con- 

 cavity, which is very deep ; the antennae are about half as long as the 

 body, and if the small second joint is bent to a particular angle it pushes 

 up a supplemental hinge, which appears at first sight like a small joint. 

 The thorax is wider than long, sinuate and angled behind ; the lateral 

 fovea oblique and deep, and a distinct antescutellar depression is present ; 

 punctuation fine, but perfectly distinct ; elytra with the usual shape of 

 species of this section, quite strongly punctate, subseriately on the disk, 

 becoming obsolete behind, transversely depressed behind the scutel and 

 subplicate. The Cachabe specimens, as a rule, are smaller and with 

 smoother elytra. Apparently a common form. The species of this 

 section K need large series to determine the species, and even then it is 

 difficult. 



D. stuarti, no v. s p. 



Head yellow; mouth black; antennae yellow, tip of last joint dark. 

 Thorax yellow, bifoveate ; scutel blackish rufous ; elytra thickly and rather 

 coarsely punctate, yellow, with the rear part nearly to the middle semi- 

 shining blue-black. Beneath yellow, with metasternum and abdomen 

 black ; legs yellow, tibiai and tarsi and apex of femora dark fuscous. 



Two examples, San Augustin, Mapiri, 3,500 feet, Sept. 1896 (\I. 

 Stuart). Length, 10 mm. 



Belongs to sec. M, and should be placed near ditnidiata Baly. Head 

 with front distinctly carinate, antennae reaching to just within the black 



