. Bulletin of the Illinois State Laboratory of Natural History. Natural history. 376 basal brownish spines on anterior margin, and with the apical fringe on the posterior margin double for fourteen hairs; posterior wings with a weak median vein reaching about to middle. Legs stout, not long; fore tarsi unarmed. Abdomen large, slightly wider than pterothorax, tapering roundly from segment 6 to base of tube. Tube about . 8 as long as head, taper- ing evenly from base to apex. Measurements:—Total length mm.; head, length .24 mm., width .21 mm.; prothorax, length . 16 mm., width (including co
. Bulletin of the Illinois State Laboratory of Natural History. Natural history. 376 basal brownish spines on anterior margin, and with the apical fringe on the posterior margin double for fourteen hairs; posterior wings with a weak median vein reaching about to middle. Legs stout, not long; fore tarsi unarmed. Abdomen large, slightly wider than pterothorax, tapering roundly from segment 6 to base of tube. Tube about . 8 as long as head, taper- ing evenly from base to apex. Measurements:—Total length mm.; head, length .24 mm., width .21 mm.; prothorax, length . 16 mm., width (including coxae) .38 mm.; pterothorax, width .42 mm.; abdomen, width .46 mm.; tube length .20 mm., width at base .092 mm., at apex .042 mm. Antennae 1, 36 fi; 2, 62 p.; 3, 81 /x; 4, 81 /i; 5, 73 //; 6, 67 //; 7, 62 ^«; 8, 35 fi; total . 50 mm. Described from a single female taken at Hillery, Illinois, in moss, by C. A. Hart and James Zetek. Genus Cryptothrips Uzel, 1895. Cryptothrips carbonarius sp. nov. (Fig. 8). Male.—Length about 2 . 22 mm. (abdominal segments somewhat telescoped). Color uniform coal- black, excepting tarsi and articula- tions of legs, which are dark black- ish brown. Head rectangular, about one and one-half times as long as wide, sides parallel; lateral and dorsal surfaces faintly reticulate, set with a number of short spines and a longer pair at middle of dorsum; vertex transverse; postocular spines long, slender, pointed; spines just behind ocelli about equal in length to the postocular. Eyes moderately large, not protruding, occupying the anterior angles of head. Ocelli moderately large, their diameter about three times that of facets of eyes; anterior ocellus not overhang- ing; posterior ocelli opposite cen- ters of eyes and almost touching their inner margins. Antennae eight-segmented, times as long as head, uniform black in|color; segments 3-6 sub-clavate; 7 Fig. 8 Cryptothrips carbonarius prothorax; b, tube male. (J. D. H. a, head and del.).
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectnatural, bookyear1876
