THE LAMELLICORX 111'! I- Tl, KS. 



953 



1799 (5<;<>7). DICIIELOXYCHA ALBICOI.LIS Bnrm., Handb. Ent.. IV, 1842, 74. 



Elongate, parallel, rather robust. Dull brownish or fuscous yellow, 

 sparsely clothed with short pubescence. Elytra with greenish lustre, the 

 suture and margins paler. Head coarsely and densely punctured; suture 

 feebly impressed ; clypeal margin moderately reflexed. Thorax coarsely 

 and sparsely punctured, sides obtusely angulate, oblique near hind angles, 

 which are broadly rounded. Elytra coarsely punctured. Males with outer 

 spur of hind tihi;e much broader than inner, truncate at tip and distinctly 

 twisted. Length 11-12.5 mm. 



Porter County: scarce. June 27-June 28. Beaten from pine 

 near Dune Park. Easily distinguished hy its larger size and deep 

 median groove of thorax. 



XX. MACRODACTYLUS Lat. 1825. (Gr., ' : ' long + toe or claw.") 



The memhers of this genus are commonly known as "rose-bugs" 

 and are elongate, rather slender beetles having the elytra densely 

 covered with yellowish scales; tarsi very long and bearing long, 

 slender diverging claws cleft at tip, more deeply in the female; 

 labrum not united with clypciis; front coxa3 prominent and conical. 

 Males with front and hind tibia- without spurs; prosternum elevated 

 in a vertical spine behind the front coxa?; pygidium elongate in- 

 stead of triangular as in the female. Two of the three known 

 North American species have been taken in Indiana. 



1800 (5690). MACHODACTYLIS SUBSPINOSUS Fab., Syst. Ent.. 1798, 39. 



Elongate, slender. Dull brownish-yellow or 

 reddish-brown, densely covered wit h yellow- 

 scales or hairs; head, thorax and under surface 

 usually darker: tarsi and apex of tibite black. 

 Thorax convex, a little longer than wide, much 

 wider at middle and rapidly narrowing thence 

 to both base and apex; surface with short, re- 

 cumbent yellow hairs, male, or with recumbent 

 hairs and short, vertical sette intermingled, fe- 

 male. Elytra indistinctly striate. Male with 

 prosternal spine as long as coxa? and visible 

 from the front, the ventral segments each with 

 two to five slender bristles on each side; ven- 

 tral segments of female with a few median erect 

 hairs. Length 8-10 mm. (Fig. 371.) 



Throughout the State; very common. 

 June 5-July 5. Noted especially on wild 

 grape vines about the borders of marshes rig. 371. Line shows natural size. 



T . . . . - (After Forlirs. ) 



and lakes in northern Indiana. This is the 



best known rose chafer or rose boolle, and is very destructive in the 



