182 TRANSACTIONS OF THE ILLINOIS 



Phyllophaga pilosicollis, Knoch. The Hairy May-beetle. 



This species is rather smaller than the preceding, being only about 

 half an inch long. It differs from that species in the following respects : 

 It is generally paler ; the head and thorax are reddish brown and covered 

 with long, pale, yellowish hairs ; the wing-cases are pale reddish yellow 

 and covered with hair, and the body is rather more completely cylin- 

 drical. 



With these exceptions, and some anatomical differences mentioned 

 in describing the specific characters, it agrees in its general features with 

 the preceding species. 



■ It makes its appearance in the central and southern portions of the 

 State early in May, as a general rule. It appears to be much more abund- 

 ant in the southern section than the former species ; in fact, I have 

 observed it here in certain seasons in large numbers, whereas the other 

 species is of somewhat rare occurrence. The P. fusca appears to be 

 replaced in the southern section by P. fraterna. 



Spec. Char. Imago. — Antenna;, tibia;, claws, coxee and form of the body as in P. 

 fusca. Head and thorax reddish brown, covered with long pale, yellowish hairs. The 

 head has the front margin entire, not notched, rounded, slightly turned up and punc- 

 tured. The lateral margins of the thorax suddenly dilated in the middle. Scutellum 

 triangular, rounded at the tip, and hairy. Elytra pale reddish yellow, or pale reddish 

 brown, covered with hair, the inner or sutural margins generally a little darker red than 

 the other portions. Breast hairy : under side a bright reddish brown. Length about 

 half an inch. 



Phyllophaga fraterna , Harr. The Kindred May-beetle. 



This is very similar in form, color and markings to P. fusca, and 

 will scarcely be distinguished from that species by the unscientific observer, 

 nor is the distinction very material in a practical point of view, as the 

 habits of the two, so far as known, are the same. \X agrees with that 

 species in color and in the absence of hajrs on the back, but is consider- 

 bly smaller, varying in length from a little over half to three-fifths of an 

 inch, and the thorax is not so distinctly and suddenly enlarged at the 

 sides. I find that most of my specimens taken this season (1875) i^^ 

 Southern Illinois, which I at first thought belonged to fusca, in fact belong 

 \o fraterna, while those taken in the vicinity of Bloomington, in the cen- 

 tral part of the State, are generally specimens oi fusca. 



Spec. C/iar. Imago. — Antennae, tibi^, claws, coxa; and form of the body as in the 

 preceding species [fusca), very similar in color and appearance to P. fusca, from which 

 it chiefly differs as follows : this is smaller ; the front margin of the head is more sharply 

 notched and rather more distinctly turned up ; the thorax is not so distinctly dilated on 

 the lateral margins, and the punctures are also more minute and less distinct. Body 

 not hairy above. Under side usually of a lighter color than the preceding species. 

 Length varies from a little over half to three-fifths of an inch. 



There are other species of this group found in the State, but as these 

 are the most common and most injurious, and their general appearance 

 and habits so nearly alike, it is unnecessary to mention any others. Dur- 

 ing the months of June and July they often fly into the room at night. 



