288 THE CANADIAN ENTOMOLOGIST. 



Males. 

 Front with a large tubercle on each side ; mesonotum bare; 



7-9 mm bifasciatus. 



Front simple; mesonotum bilineate; segments 1-6 with apical 



fascial i . 



1. Pleura below finely and densely punctured ; scutel flat 3. 



Pleura below coarsely and sparsely punctured ; scutel bilobed 2. 



2. Mandibles simple; thorax coarsely punctured lectoides. 



Mandibles with an internal tooth ; 7-9 mm interruptus. 



3. Scutel quite surpassing lateral spines ; spurs red ; 7-9 mm.autumnalis. 

 Scutel hardly surpassing lateral spines ; spurs black; 6-8 mm.pusillus. 



LIST OF CANADIAN COLEOPTERA. 



BY JOHN D. EVANS, TRENTON, ONT. 



(Continued from page 243.) 

 Gyrinidce. 

 1505, Gyrinus minutus, Fab., '80. 

 *i5i4, " aquiris, Lee, '80. 

 sp., '80. 



Hydroph ilid^s. 



1542, Helophorus oblongus, Lee, '79, '80. 



1543, " lacustris, Lee, '80. 

 1546, " linearis, Lee, '80. 

 1597, Hydrocharis obtusatus, Say, '80.- 

 1614, Berosus striatus, Say, '80, 'Sj. 



*i622, Laccobius ellipticus, Lee, '80. 

 1653, Hydrobius fuscipes, Linn., '79, '81. 

 Cercyon, sp , '81. 



Slip hides. 

 1698, Necrophorus marginatus, Fab., '79, '80. 

 1702, " vespilloides, Hbst , '8r. 



1706, Silpha lapponica, Hbst, '79, '80. 



1707, " irituberculata, Kirby, '81. 



1709, " noveboracensis, Forst., '81. 



17 10, '' Americana, Linn., 'Si. 

 *i7ii, " ramosa, Say, '79, '80, '81. 



