Till': ^.\^n•:LLK'OT!X 1!i;i:ti.i:s. 



993 



Xylorydes satyrus. 

 Female. Natural size. 



Fig. 411a, 



shining; under surface paler and rather thickly 

 clotluHl with ri'ddish-hrown hairs. Male with the 

 I'l'diit linir nl' ilKU'.ix almost i)erpendicular, the sldpc 

 with irregular transverse ruws of oblong punctures ; 

 basal half convex, very finely and sparsely i)unc- 

 tnred; sides roundi'd, thickly fringed with Itrown 

 hairs; female with thorax strongly convex. i>ut 

 slightly sloping in front of middle. Elytra striate, 

 with rows of rather fine, feebly impressed punc- 

 tures; the strire deeper and punctures larger in 

 female. Length 25-28 mm. (Figs. 411-411a.) 



Wells, Marion, jNIonroe and Posey coun- 

 ties ; scarce. June 3-September 8. Prol)ably occurs sparingly over 

 tlie southern two-thirds of the State. The larva? are said to be in- 

 jurious to ash trees by feeding upon their roots, and the adults are 

 usually found in the vicinity of those trees. 



XXXIV. Dynastes Kirby. 1825. (Gr., ''a ruler.") 

 To this genus belong the largest of kno^vn beetles, some of the 

 tropical species being nearly three inches in length and more than 

 an inch in thickness. In the southern United States and extend- 

 ing northward over the southern third of Indiana is one species, 

 sometimes called the "unicorn beetle." The generic name Dy- 

 nastes having the same origin as the English "dynasty," and mean- 

 ing sovereignty, has been given to these lieetles on account of their 

 large size and imposing appearance. 

 1855 (5886). Dynastes tityus Linn., Syst. Nat., 176G. 



Broadly oval. Usually green- 

 ish-gray, with brownish or pic- 

 eous spots scattered irregularly 

 over the elytra ; rarely uniform 

 dark chestnut-brown. Male with 

 thorax three-horned, the ones on 

 sides short and curved, the me- 

 dian one bearded with yellowish 

 hair beneath, bitid at tip and pro- 

 jecting forward to meet a long 

 curved horn arising from the 

 head. Females with only a slight 

 tubercle on middle of head. En- 

 tire upper surface of male almost 

 wholly smooth ; female with tho- 

 rax sparsely and finely punctate, 

 more densely and coarsely on 

 sides and near front angles; ely- 

 tra with coarse and very fine 

 punctures intermingled on basal 

 half, apical half smooth. Length 

 of male 40 to 5U mm., exclusive of horns; of female, 45 mm. (Fig. 412.) 



Fig. 412. Natural size, (.\fter Riley.) 



