112 



ENTOMOLOG T. 



Fig. 124— Larva of 

 "Lady bird." 



Family Erotylidpe. — Tarsi more or less dilated and spongy beneath. 

 Erotylus; Dacne 4-maculata (Say). 



Family Endomychidae. — Tarsi 4-jointed, or, 

 from the atrophy of the third joint, apparently 

 3- jointed; claws simple. Endomychua biguttatus 

 Say. 



Family Coccinellidae. — Hemispherical beetles 

 with the head deeply immersed in the prothorax; 

 tarsi with the second joint dilated; claws appen- 

 diculate or toothed, sometimes simple; larva; of 

 great benefit to agriculture from devouring 

 Aphides. When about to pupate, the larva at- 

 taches itself by the end of the body to a leaf, and 

 either throws off the larva skin, which remains 

 around its tail, or the cast skin is retained, loose- 

 ly folded about the pupa as a rude sort of co- 

 coon. Coccinella nowm-notata Herbsl Fi*:. 123); 

 Psyllobora 2Q-maculata Say (Fig 124). 



Family Corylophidae. — Wings fringed with long 

 hairs; a loose antennal club. Corylophw truncatus Lee. 



Family Phalacridae. — Body oval, convex; scutellum larger than 

 usual. Phalacrus oralis Lee. 



Family Scaphidiidae. — Body oval, convex; elytra broadly truncate 

 behind; tarsi long and slender. Scaphidium quadrtguttatum Say. 



Family Sphaeriidae. — Wings fringed with long hairs; abdomen 

 with 3 ventral segments. Sphcmtts politus Horn. 



Family Hydroscaphidae. — Antenna? short, not verticillate, abdomen 

 prolonged. Hydrosca/pJia natans Lee. 



Family Tri diopter vgidae. — Antenna? slender, verticillate; abdomen 

 not prolonged; the smallest beetles known. Trichopteryx aspera 

 Haldeman. 



Family Staphylinidae. — Elytra very short; abdomen entirely cor- 

 neous, with 7 or 8 visible segments. The 

 rove-beetles, recognized by their narrow, 

 long bodies and upturned abdomens, are 

 often minute, living under stones, in ma- 

 nure-heaps, fungi, moss, and in ant-hills. 

 Staphylinus wlpinus Nordm. 



Family Pselapbidae. — Very small; head 

 and prothorax narrower than the elytra 

 and abdomen, the latter obtuse at tip. 

 Pselaphus erirhxonii Lee. 



Family Scydmaenidas. — Differing from 

 Pselaphids by the long elytra. Bcydmcenus 

 marue Lee. 



Family Silphidae. — The burying beetles 

 have the antenna? clubbed, sometimes near- 

 ly filiform; larvae broad, sides of body 

 serrated. Necrophorus americanus Oliv., 

 Silpha lapponiai Herbst, 8. surinamerms 

 Fabr. Adelops hirtus Tellk. is a blind cave- 

 beetle. 



Family Leptinidae .— Eves absent or imperfect. Leplinus testaceus 

 Mull, is parasitic on mice, etc. ; Leptinillus validus Horn on the beaver. 



Fig 125.— Platypsylla of 

 the beaver. — After Le 

 Conte. 



