248 ACADEMY OF NATURAL SCIENCES 



The body of this insect as well 'as the preceding, is long and 

 narrow, the diameter of the head which passes through the eyes 

 is but little shorter than the breadth of the thorax. 



ACANTHIA Latr. 



A. INTERSTITIALIS. — Black, hemelytra with a few whitish 

 spots, tip whitish with black nervures and spots. 



Inhabits Missouri. 



Body leaping, black-brown, with short yellowish hairs : eyes 

 largo, deep castancous, whitish at [325] the anterior base: 

 stemmata reddish-yellow : clypeus and labrum whitish : hemely- 

 tra deep black, with distant, very short yellowish hairs at base, 

 four or five hyaline whitish spots on each hemelytron ; middle of 

 the tip of the coriaceous portion hyaline, membranaceous tip 

 hyaline, nervures deep black, with a blackish oblong-quadrate spot 

 between each pair ; margin dusky, with a black spot at the ex- 

 terior tip : feet pale before and black behind : tibia somewhat 

 annulate : wings white. 



Length more than three-twentieths of an inch. 



Not uncommon on the shore of the Missouri river, skipping 

 nimbly about. 



TINGIS. 



T. OBLONGA. — Head with three elongated acute spines ; ner- 

 vures brown ; exterior margin of the hemelytra white. 



Inhabits ^liesouri. 



Body elongate, narrow, whitish: head with three elongate, 

 linear acute spines, of which two are above the antennae, and one 

 between them : eyes black : antennse testaceous, terminal joint 

 blackish : thorax and scutel conjunctly, black in the middle ; 

 three elevated white lines and reflected margin ; a much elevated, 

 acute crest at the anterior termination of the intermediate line: 

 hemelytra, a double slightly elevated line, confluent at tip and at 

 base, and including a small blackish dot; [326] nervures of the 

 tip and inner margin black-brown ; exterior margin white imma- 

 culate : pectus, postpectus and venter black : feet pale testace- 

 ous. 



Length nearly one-eight of an inch. 



[Vol. IV. 



