992 



FAMILY L. SCARAB/EIDiE. 



1S52 (5871). LiGYEtrs relictus Say, Journ. Phil. Acad. Nat. SeL, V, 1825. 

 194; ibid. II, 296. 



Oblong, very robust. Piceous black, shining. Trans- 

 verse carina of head interrupted at middle; clypeus 

 with two teeth. Thorax strongly convex, hind angles 

 broadly rounded, surface finely and sparsely punc- 

 tured. Elytra with rather fine punctures, those of 

 center of disk arranged in three double rows ; those 

 on sides and near suture much confused. Male with 

 inner claw of front tarsi thickened, . dilated and ab- 

 ruptly curved. Length 18-23 mm. (Fig. 410.) 



Throughout the State, frequent; more so 

 about the sandy lake shores of the northern coun- 

 ties. May 26-August 26. Occurs at electric 

 light and beneath rubbish . The larvae live in old, 

 well -rotted manure piles. 



Fig. 410. X 1£. 

 (After Knobel.) 



XXXII. Aphonus Lec. 1S58. (Gr., "without + voice. ") 



The un toothed mandibles and the lack of stridulating organs on 

 the under surface of the elytra are the principal characters separat- 

 ing this genus from Ligyrus. In our species the tip of the clypeus 

 is elevated, and immediately behind it is a sharp, transverse ele- 

 vated line which bears three blunt teeth. One of the four recog- 

 nized species has been taken in the State, 



1S53 (5874). Aphonus tridentatus Say, Journ. Phil. Acad. Nat. Sci., Ill, 

 1S23, 209 ; ibid. II. 134. 

 Oblong-ovate, robust. Black or piceous-black, shining ; beneath dark 

 reddish-brown. Thorax about one-third wider than long, strongly convex, 

 sides feebly curved, hind angles obtuse, basal margin sinuate ; surface finely 

 and sparsely punctate. Elytra striate, the striae with rows of rather fine 

 punctures; intervals subconvex, irregular in width and with scattered 

 coarse punctures. Length 13-16 mm. 



Putnam, Vigo, Floyd and Posey counties; scarce. May 10- 

 July 29. Occurs about old decaying stumps in which the larvae 

 live; also at light. 



XXXIII. Xyloryctes Hope. 1837. (Gr. 

 ' ' wood + a digger. ' ' ) 

 This genus contains a single large bulky 

 form, having the mandibles prominent, not 

 toothed on the outer side; the male with a 

 long curved horn arising from the middle of 

 the head, whence the common name of "rhi- 

 noceros beetle. " 



1854 (5880). Xyloryctes satyrus Fab.. Syst. 

 Eleut, I. 1801, 15. 

 Oblong, robust. Dark chestnut to piceous brown. 



Fig. 411. Male. Natural size. 

 (After Glover.) 



