710 



FAMILY XXXVII. ELATEEIDiE. 



Crawford County; rare. June 5. Taken from decaying beech 

 log. Kn(nvii heretofore only from Ohio. 



Sa)-i)cdo)) scahrosus Bonv., black, apical margin 

 of thorax reddish, length 6.5 mm., is known from 

 Canada, Tennessee and Nebraska. (Fig. 275.) 



IX. Nematodes Latr. 1825. (Gr., "thread-like.") 



Elongate, cylindrical species, having the anten- 

 na^ filiform ; mandibles rather broad and coarsely 

 punctured; prosternal sutures straight; hind coxal 

 plates widely dilated on inner side ; fourth joint of 

 Fig. 275. sarpedon scab- tarsi cxcavate-cmarginate and slightly lobed be- 



rosus Bonv. (After Horn.) 



neath. 



KEY TO INDIANA SPECIES OF NEMATODES. 



0. Joints 4, 5 nud 6 of antennae distinctly longer than wide, and very little 

 sliorler than the following joints. 3341. atropos. 



ua. Joints 4 and 5 small, not longer than wide, 7 to 11 equal, rather ab- 

 ruptly longer, 

 ft. Sixth joint of antennic not longer than fifth, distinctly shorter than 

 the seventh ; size smaller, not over G mm. 1342. penetrans. 



1)1). Sixth joint of antennre as long as seventh, distinctly longer than 

 fifth ; size 8 or more mm. 1343. collaris. 



1341 (4058). Nematodes atropos Say, Trans. Amer. Thil. Soc, VI, 1830, 



187; ibid. II, 626. 

 Elongate, subcylindrical. Dark brown, almost black, subopaque ; an- 

 tenna; and legs reddish-brown. Antennje slightly less than half the length 

 of body, second joint longer than fourth, third nearly equal to the next 

 two, 4 to 11 gradually longer, each longer than wide. Thorax distinctly 

 longer than wide, widest (ine-third from apex, hind angles acute; disk 

 slightly flattened at middle, median line impressed nearly to apex, a more 

 or less distinct fovea on each side; surface densely and rugosely punctate. 

 Elytra gradually narrowed from base to apex, surface sti-iate; intervals 

 flat, densely but less coarsely punctate than thorax. Length 6.5-9 mm. 



Wells County; scarce. Collected by E. B. Williamson. July 1. 

 Described from Posey County. 



1342 (40.59). Nematodes penetrans Lee, Proc. Phil. Acad. Nat. Sci., VI, 



1852, 47 

 Elongate, subcylindrical, slender. Dark brown or ijiceous, feebly shin- 

 ing; antennse and legs reddish-brown. Antennjo less tluui half the lengtli 

 of body, second joint longer than fourth, third as long as the next two, four, 

 five and six, short; seven to eleven eacli as long as third. Thorax dis- 

 tinctly longer than wide, sides at apical third narrowing to the front, basal 

 two-thirds straight and parallel; disk with a distinct median impression 



