. First[-ninth] annual report on the noxious, beneficial and other insects, of the state of Missouri, made to the State board of agriculture, pursuant to an appropriation for this purpose from the Legislature of the state . spines, and the two tubercles on joint 2 are often tipped with l)lack. Inthe fourth stage there is considerable variation, but generally the body is still paler and covered witha whitish pruinescence or powder which recalls the powdery ajjpearance of c^(i/Aia at the same age;the transverse stripes are broader (Fig. 43, c, represents an enlarged side view of one o
. First[-ninth] annual report on the noxious, beneficial and other insects, of the state of Missouri, made to the State board of agriculture, pursuant to an appropriation for this purpose from the Legislature of the state . spines, and the two tubercles on joint 2 are often tipped with l)lack. Inthe fourth stage there is considerable variation, but generally the body is still paler and covered witha whitish pruinescence or powder which recalls the powdery ajjpearance of c^(i/Aia at the same age;the transverse stripes are broader (Fig. 43, c, represents an enlarged side view of one of the joints) andshow a tendency to approach between the tubercles; the dorsal rows of tubercles are sulphur-yellow,except on joints 1 and 12, where they are black, and the central yellow tubercle on joint 11 becomesmore pronSinenl; the subdorsal row is entirely black, and the stigmatal row is black oil the thoracicjoints and yellow on the rest; three black ventral tubercles each side of thoracic joints are now oftenquite conspicuous; the spines correspond in color to the tubercular stalk; the head (Fig. 43 6) is yel-low, with the lips an 1 triangular piece ;white, and is jn-ettily marked with black, as follows: two. 122 FOURTH ANNUAL REPORT OF black spots on frons, one behin I antenna;, a stripe around hibrum, and one at lower base of cheek:the anal legs are also marked above with a rectangular black stripe. In the fifth stage, i. e., after thefourth moult, the appearance is totally changed: the body is of a mist delicate bluish-white, with afaint pruiuescence; all the spiny tubercles become smooth, and with the exception of the four dorsalones on joints 2 and :i and the Iirge one on joint 11, they are mere rounded,* i)olished, black or blue-black elevati(nis; the f)ur on joints 2 and ;iare at lirst yellow, with a black anuulation, but theysoon become red; that on joint 11, which is of the same size, remains yellow with its black base; therectangular black mirk on anals
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectb, booksubjectinsects
