. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. Pig. 185.—Prosterna of beetles. A, Coxal cavities (CC) confluent and open behind; B, coxal cavities feeparated and open behind; C; coxal cavities separated and closed behind. {After Wickham.) DD. Penultimate joint of labial palpi with a number of bristly hairs in front and always longer than last joint; first antenna! joint elongate; head elongate-oval, prolonged behind the eyes.—Galerita. BB. Head with but one bristle
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. Pig. 185.—Prosterna of beetles. A, Coxal cavities (CC) confluent and open behind; B, coxal cavities feeparated and open behind; C; coxal cavities separated and closed behind. {After Wickham.) DD. Penultimate joint of labial palpi with a number of bristly hairs in front and always longer than last joint; first antenna! joint elongate; head elongate-oval, prolonged behind the eyes.—Galerita. BB. Head with but one bristle-bearing puncture above the eye. C. Elytra truncate at apex; mandibles with a bristle-bearing punc- ture in outer groove; hind coxae often separated.—Brachiniis (Bombardier Beetle). CC. Elytra always entire; mandibles without a bristle-bearing puncture; hind coxae contiguous. D. Antennas with only two basal joints glabrous; black, front tarsi of male dilated and with two rows of small scales beneath; first joint of hind tarsus not longer than the two following.—Harpaliis. AA. Middle coxal cavities not entirely closed by the sterna (Fig. 185). B. Hind coxas not separated; labrum not forked; third joint of antennae cylindrical.—Carabus. BB. As in B, but third joint of antennae compressed.— 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 Lochhead, William, 1864-. Philadelphia, Blakiston
Size: 1642px × 1521px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
