Antennae, 4-segmented; ocelli, 2; beak, 4-segmented;
front wing with many veins; tarsi, 3-segmented.
Scent glands present on the thorax.
Head narrower than and often shorter than the pronotum.
Hind tibiae of some species expanded and resembling leaves
Species in the family Coreidae are separated from those in Alydidae by
differences in width and length of their heads relative to the pronotum.
Alydids, commonly called broadheaded bugs, have a head that is nearly as
wide as and as long as the pronotum.
References:
Pages 122-123 in D. J. Borror and R. E. White. 1970. A Field Guide to the
Insects. Boston: Houghton Mifflin Co.
Page 57 in J. A. Slater and R. M. Baranowski. 1978. How to Know the True
Bugs. Dubuque, Iowa: Wm. C. Brown Co. 256 p.
Page 152 in R. G. Bland and H. E. Jaques. 1978. How to Know the Insects,
3rd ed. Dubuque, Iowa: Wm. C. Brown Co. 409 p.
Page 306 in D. J. Borror, C. A. Triplehorn, and N. F. Johnson. 1989. An Introduction
to the Study of Insects, 6th ed. Philadelphia: Saunders College Publishing.
875 p.
Page 421 in H. V. Daly, J. T. Doyen, and A. H. Purcell III. 1998. Introduction
to Insect Biology and Diversity, 2nd ed. Oxford University Press. 680 p.
