. Circular. Insects. OF THE UNIVERSITY of ILLINOIS. circular no. 78. United Slates Department of Agriculture, BUREAU OF ENTOMOLOGY, L. O. HOWARD, Entomologist and Chief of THE SLENDER SEED-CORN (xROUND-BEETLE. (Clivina impressifrons Lec.) By F. M. Webster, In Charge of Cereal and Forage-Plant Insect Investigations. 1 The subject of this circular is a small, hard-bodied beetle, belong- ing to the tribe Scaritini of the family Carabidae or ground beetles. The former name is derived from a word which means literally " a scratcher," and these beetles have been so designated on a
. Circular. Insects. OF THE UNIVERSITY of ILLINOIS. circular no. 78. United Slates Department of Agriculture, BUREAU OF ENTOMOLOGY, L. O. HOWARD, Entomologist and Chief of THE SLENDER SEED-CORN (xROUND-BEETLE. (Clivina impressifrons Lec.) By F. M. Webster, In Charge of Cereal and Forage-Plant Insect Investigations. 1 The subject of this circular is a small, hard-bodied beetle, belong- ing to the tribe Scaritini of the family Carabidae or ground beetles. The former name is derived from a word which means literally " a scratcher," and these beetles have been so designated on account of their widened, flattened, and toothed fore legs, adapting them for digging. They are ^Cjlp' f 'generally believed to be both carnivorous and preda- ceous. About 220 species of the genus have been described, principally from the tropics; of these some 22 inhabit America north of Mexico, while 18 of these 22 are known to occur in Louisiana and Texas. Clivina planicollis Lec, one of this number, is known fig. %m- falso from Mexico, and C. impressifrons, here discust, pressifrons: Adult 1 'or beetle. En- extends its range northward to Nebraska, northern larged (original). Illinois, Michigan, and New York. DESCRIPTION OF THE INSECT. The fully matured beetle is entirely of a reddish color and about one- fourth of an inch long ( mm.), the shape of the body being as shown in figure 1. It may be recognized by the aid of the following brief technical description: The lateral margin of the thorax attains the basal margin, middle tibiae with a spur on the outer side near the tip ; anterior femora not dentate, thickened ; paronychium elongated; vertex silicate, head smooth, punctured behind, verti- cal groove deep and long. I Its earlier stages are as yet unknown, altho the larvae must certainly be very abundant somewhere. We know nothing of its breeding habits, as it is the fully developed insect that does the injury. INFESTS LOW-LYING, FLAT LANDS. This beetle appear
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