902 FAMILY XT.VTII. — SPHINIDID^T:. 



front margin of the eyes, the first joint large and stout, 3 to 7 slen- 

 der, small, the third as long as the two following, 8 to 10 forming 

 an oval, bifoliate club as long as the stem; thorax truncate before 

 and behind, with distinct side margins ; prosternal sutures deep for 

 the reception of the antennce, which in repose are folded with the 

 club bent suddenly outward, behind the front leg; front coxae trans- 

 verse, small, the cavities separated by the prosternum, narrowly 

 closed behind ; elytra entire, epipleura narrow ; abdomen with five 

 free ventral segments; front and middle tarsi 5-.jointed, hind ones 

 4- jointed; claws small, simple. 



The three species comprising the family represent as many dif- 

 ferent genera, and all |)i'()l)a])ly occur in the State, though but one 

 has been taken. 



KEY TO GENEKA OF SPHINUID^. 



a. Sides of thorax with six or seven teeth, its flfinivs not concave; body 

 smooth. Odontosphindus. 



aa. Sides of thorax entire. 



h. Body finely pubescent; tlanlvs of thorax slightly concave. 



I. Sphindus. 



bb. Body broadly oval, clothed with erect hairs; flanks of thorax deeply 



concave, Eurysphindus. 



L. Sphindus Chev. 1833. (NTi., a made word.) 



This genus, sufficiently characterized al)ove, is represented by the 

 single species: 



1714 (5409). Sphindus AMEKicANrs Lee, New Sp. N. Anier. Col., I, 18GG, 

 104. 

 Oblong, convex. Piceous-black, the elytra often dark brown; antennae 

 and legs reddish-brown. Thorax one-half wider than long, sides strongly 

 rounded, disk convex, finely and rather closely punctate. Elytral striaj 

 feebly impressed, coarsely but shallowly punctate; intervals finely punctu- 

 late; umbone prominent. Length 2-2.5 mm. 



Marshall and Marion counties; rare. INTay 20-June 7. Taken 

 from fungus on beech and sifted from decaying linn stump. Pro]> 

 ably occurs throughout the State. 



The other two species of the family are Eurijsphindus Mr his 

 Lee, 1.6 mm. in length, blackish-brown, pubescent with erect hairs, 

 and Odotitospliiixlns dcntUoUis Lee, elongate, snl)cylindrical, 

 brown, and 2.7 mm. long. Both were described from near Detroit 

 and have lieeu recorded bv Dury from Cincinnati. 





