112 



ENTOMOLOGY. 



FIG. 124. Larva of 

 "Lady-bird." 



Family Erotylidce. Tarsi more or less dilated and spongy beneath. 

 Erotylus; Dacne 4-macitlata (Say). 



Family Endomychidae. Tarsi 4-joiuted, or, 

 from the atrophy of the third joint, apparently 

 3- jointed; claws simple. EndomycJius 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; larvae 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 novem-notata Herbst (Fig. 123); 

 Psyllobora 20-maculaia Say (Fig. 124). 



Family Corylophidae. Wings fringed with long 

 hairs; a loose antennal club. Corylophus truncalus Lee. 



Family Phalacridae. Body oval, convex; scutellum larger than 

 usual. Phalacrus ovalis Lee. 



Family Scaphidiidae. Body oval, convex; elytra broadly truncate 

 behind; tarsi long and slender. ScapMdium quadriguttatum Say. 



Family Sphaeriidae. Wings fringed with long hairs; abdomen 

 with 3 ventral segments. Sphcm us politus Horn. 



Family Hydroscaphidas. Antennae short, not verticillate; abdomen 

 prolonged. Hydroscapha natans Lee. 



Family Trichopterygidae. Antennae slender, verticillate; abdomen 

 not prolonged; the smallest beetles known. TricJwpteryx aspera 

 Haldenian. 



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 mdpinus Nordm. 



Family Pselaphidae. Very small; head 

 and prothorax narrower than the elytra 

 and abdomen, the latter obtuse at tip. 

 Pselaphus ericJtsonii Lee. 



Family Scydmaenidae. Differing from 

 Pselaphids by the long elytra. Scydmcmus 



ittd'i t/CK JjGC* 



- Family Silphidas. The burying beetles 

 have the antenna? clubbed, sometimes near- 

 ly filiform; larvae broad, sides of body 

 serrated. NecropJuirus americamis Oliv., 

 Silpha lapponica Herbst, 8. surinamensis 

 Fabr. AdelopshirlusTelik. is a blind cave- Conte. 

 beetle. 



Family Leptinidas. Eyes absent or imperfect. Leptinus testaceus 

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



FIG. 

 the 



125. Platypsyllus of 

 beaver. After Le 



