BEETLES. 



958 



1799 ( 5'J07 ) . DicHELONTCHA ALBicoLLis Burni., Handb. Ent., I^'. 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 imin-essed ; 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 tibiis 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 distingui.shed by its larger size and deep 

 median groove of thorax. 



XX. ^lACRODACTYLts Lat. ls2-5. (Gr., "long + toe or claw.") 



The members 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 clypeus : front coxie prominent and conical, 

 ^lales \\-ith front and hind tibial without spurs : prosternum elevated 

 in a vertical spine behind the front coxse; pygidium elongate in- 

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

 North American species have been taken in Indiana. 



ISOO f.oG90). Mackodactylus subspi^g.sus Fab., Syst. Ent., 1798, 39. 



Elongate, slender. Dull brownish-yellow or 

 reddish-bro^vn, densely covered with yellow 

 scales or hairs; head, thorax and under surface 

 usually darker; tarsi and apex of tibias 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 setse intermingled, fe- 

 male. Elytra indistinctly striate. Male with 

 prosterual spine as long as coxse 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 S-10 mm. fFlg. 371.) 



Throughout the State; very common. 

 June 5— July 5. X^oted esiieciaUy on wild 

 grape v)n<'s about the borders of marshes 

 and lakes in northern Indiana. This is the 

 best known rose chafer or rose beetle, and is ^-ery destructive in the 



Fig. 371. 



Line shows natural size. 

 l-Uter Forbes.) 



