INSECT ENEMIES OF EASTERN FORESTS 163 
KEY TO THE GENERA OF LAMELLICORN BEETLES IMPORTANT TO FORESTRY IN 
10. 
Wile 
12. 
19 This key is in part adapted from Blatchley (50), and in part original. L. W. 
EASTERN NORTH AMERICA !! 
with heavily ridged wing covers, about 35 mm. long. (Family 
BASSAI AC) Mee een ee et 8 Bae ee ie nk es Oy Popilius® DD 
Mentum entire; mandibles very large, extending well beyond the 
labrum. (Family Lucanidae)______________ ge aree ce veo 3 
Antennae elbowed at Ist joint, which is about as long as all others 
COT Lo) TIC Cl eae pape eee SR eee hs AD et I ee a + 
Antennae straight or curved, not elbowed_________________Z____ 6 
Wing covers smooth or nearly so, usually reddish; front tibiae with 
distinetateethvonvouter edges 25 6 eee ya Be ae) Lucanus CC 
Wing covers more or less grooved and punctate, or rugose________ 5 
Eyes strongly notched by the margins of the head; 15 to 27 mm. 
ohn ne eee ees al te ene ccs Se es Sco ie Dorcus BB 
Eyes entire, or only slightly notched by the margins of the head; 
NORtOsAsmimes On gaa ee ere Cee ee eae ae a Platycerus V 
Front of head depressed, especially in males; 10 to 16 mm. long 
Ceruchus W 
Front of head not depressed elevated strongly in males, normal in 
females, and with a horn in the former and a tubercle in the latter 
sex; strongly rugose dorsally; form cylindrical; 15 to 20mm. long 
Sinodendron xX 
Sides (epimera) of mesothorax not reaching the coxae; wing covers 
rough, covered by wartlike protrusions; often covered by dirt and 
dried animal matter. Family Trogidae, not further considered in 
this key. 
Sides (epimera) of mesothorax reaching the oblique coxae; wing 
covers smooth, hairy, punctured, ridged, or more or less rugose, 
but never covered by wartlike protrusions (Family Scarabaeidae) _ 8 
Abdominal spiracles in part situated on the superior portion of the 
ventral segments, the rows of spiracles feebly diverging. Includes 
the more typical leaf chafers. (Subfamily Melolonthinae)______ 9 
Abdominal spiracles, except the 3 front ones, situated on the 
dorsal portion of the ventral segments, forming 2 rows which 
GIVE OCES UROM CG lye teen erat. ea Ae ee ee ee ee 15 
Form elongate, more or less slender; legs proportionately long; dorsal 
color metallic green, bronzed, or dull yellowish______-_____-_-- 10 
Form robust and often quite large; dorsal ground color dark brown, 
reddish, or black; with or without colored hair or scales above___ Mal 
Wing covers not, or only very slightly, scaled, hairy or not; claws 
minutely to noticeably cleft at apices; thorax as wide or wider 
ihanwlonewes.¢Melolonthimae) ==: 2. = Soe 2 =e 2 2 Dichelonyx B 
Wing covers with slender hairlike scales; claws widely, distinctly 
cleft at apices; thorax always noticeably longer than wide. 
@Wielolomthinae) st ama oe Se ee _____Macrodactylus D 
Abdomen with 5 ventral segments; wing covers with shallow, 
punctured, longitudinal furrows, or without furrows and 
punctured finely and uniformly. (Melolonthinae) ---_-Dzplotazxis C 
Apexsslzenusuallyalessitiam: Il) mm.) === 2 1133 
Saylor examined this portion of the manuscript in its entirety and made a number 
of very helpful suggestions. The writer is also indebted to the Milwaukee Publie 
Museum, through its staff members, T. E. B. Pope, curator of Lower Zoology, and 
Kenneth MacArthur, assistant curator of Lower Zoology, for permission to study 
certain lamellicorn groups and for photographs of the beetles. 
20 The letters to the right of the generic names of the groups included in the adult 
key refer to the letters in figure 39, in which a typical species of each genus con- 
sidered is illustrated. 
