222 Illinois State Lahoratory of Natural Hiatory. 



[^], brownish near the acute apex, and bearing anteriorly 

 the palpi [f], which have thick short joints; antennae 

 [b] slender, directed outwardly, attached to the anterior 

 angles of the head above the palpi, three-jointed, basal 

 joint quite short; a bunch of stiff diverging recurved 

 hairs between each antenna and the median line above. 



Prothorax grooved below; dorsal and ventral areas 

 •of each body segment (limited by the upper and lower 

 pairs of lateral lines) alike, longitudinally striated or 

 nearly smooth, the striation greatest in young larvae; 

 those of thorax with discal punctures, abdomen with a 

 Y-shaped group of punctures on each side of the dorsal 

 areas, and a short oblique row, similarly placed, on 

 the ventral areas; lateral areas always regularly 

 longitudinally striate between the lines of punctures^ 

 The upper and lower of these lines are distinct, 

 with numerous punctures; the two intermediate ones 

 have fewer punctures, are often indistinct, especially upon 

 the abdomen, and are wanting upon the prothorax. 

 Abdominal segments except the last with a circle of 

 fleshy tubercles or false feet near their anterior margins, 

 consisting of two transverse dorsal, one lateral each 

 side, and four rounded ventral ones. La!^t segment 

 with a bilobed rounded anal prominence beneath, and a 

 subconical retractile short prolongation at apex above, 

 with a terminal vertical stigmatal slit, from which a 

 sharp compressed spine often projects [Fig. 48]. 



Pup(B [Fig. 43].— Subcylindrical, rather abrupt in 

 front, tapering rapidly behind; ferruginous-brown, often 

 tinted with fuscous; finely wrinkled and subopaque, each 

 abdominal segment with a fringe of slender spines pos- 

 teriorly. 



On each side of the head anteriorly are the short, thick, 

 appressed, antenna! sheaths; between them, a little above, 

 a pair of prominent setiferous tubercles; a little below, 

 a pair of transverse elevations, crested with a sharp 

 transverse ridge, separated by a narrow deep cleft at 



