. Bulletin of the Department of Agriculture. Agriculture. 6 BULLETIN 421, V. S. DEPARTMENT OF AGRICULTURE. 0.:{15 mm.; one pair of fiotir on each lateral margin of the prothorax, and one on the posterior margin; two pairs on the dorsum of the mesothorax and metathorax. Abdomen tapering gradually posteriorly until the ninth segment, then abruptly. Segments 9 and 10 much narrower than the rest and bearing the rudiments of a pair of obtuse spines on the posterior margins. The first abdominal segment bears one pair of lateral setip; segment 9, one pair dorsally and one laterally; segment 10 b
. Bulletin of the Department of Agriculture. Agriculture. 6 BULLETIN 421, V. S. DEPARTMENT OF AGRICULTURE. 0.:{15 mm.; one pair of fiotir on each lateral margin of the prothorax, and one on the posterior margin; two pairs on the dorsum of the mesothorax and metathorax. Abdomen tapering gradually posteriorly until the ninth segment, then abruptly. Segments 9 and 10 much narrower than the rest and bearing the rudiments of a pair of obtuse spines on the posterior margins. The first abdominal segment bears one pair of lateral setip; segment 9, one pair dorsally and one laterally; segment 10 bears one jmr; the remaining segments bear two pairs dorsally and one pair laterally. Third stage (fig. 5).—Head subquadrate, wider than long; length mm.; width mm. Eyes dark red, small; ocelli absent. Antennal cases, segments con- fused; only five apparent; length mm. Prothorax transverse, half as long as broad; length mm.; width mm.; a row of set:r on the lateral and posterior margins. Mesothoracic angles prominent;. Mi Fig. 3.—Newly-hatched nymph of sugar-beet thrips. Enlarged about 100 diameters. (Original.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Department : Supt. of Docs. , Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
