THE LEAP BEETLES. 



1171 



from which they emerge as imagoes in six to ten days. There are 

 usually two broods each season, those of the second hibernating. 



The only ronedy is the spraying of the trees with an arsenical 

 solution two or three times a year; once just after the buds have 

 opened, to kill as many of the mating insects as possible ; a second 

 time two or three weeks later to kill the larvie, the majority of which 

 have hatched by that time. A third spraying about June first wiU 

 also be found beneficial. The crushing of the larvae at the surface 

 of the ground when they are about to transform is also recom- 

 mended. With the foothold that it has gained the beetle will un- 

 doubtedly spread over the southern third of the State and ulti- 

 mately do much damage to the many noble elms of that section. 



Monoxia puvcticollis Say, pale yellow to entirely black, or elytra 

 with stripes, length 7-8.5 mm., is known from ^Massachusetts and 

 Florida westward. 



XLVI. Dlubrotica Chev. 1850. (Gr., "through -h gnaw.") 



Small or medium-sized, oval or ob- 

 long beetles having the head not inserted 

 as far as the eyes, 'vvliich are broadly oval 

 and entire ; antennjE slender, longer than 

 half the body, second and third joints 

 often verj' small; thorax broader than 

 long, sometimes nearly square, the disk 

 usually -nith two pits or fovese; elytra 

 with a very distinct and slightly reflexed 

 side margin; front coxas contiguous, the 

 cavities open behind; tibife slender, the 

 middle and hind pair with terminal 

 spurs, the outer edge usually carinate 

 from knee to tip; first joint of hind 

 tarsus as long as the next two; tarsal 

 ekws bifid. Three species have been 

 taken in the State, and a fourth prob- 

 ably occurs. 



Pig. oil. X 5J. 

 (After Forbes. ) 



KEY TO INDIANA SPECIES OF DI.4BR0TICA. 



'. Tibia; rai-iuate iiloii.^' tlie outer edge; clyti-ii without lilaciv stripes. 

 /). El.vtra eacli witli six lilack siiots ; abdomen and base of femora pale. 



2169. 12-PUNCT.4TA. 



66. Elytra unicolorous without spots. 



