48 GEO. H, HORN, M. D. 



The male anteiior tibial spur is prolonged much beyond the apical 

 tooth reaching nearly the tip of the third tarsal joint, in the female 

 it barely reaches the tip of the second joint. 



From the style of marking and color of elytra this species should 

 be associated with j^nrdalU and inqidnatus and was so placed at the 

 time when the frontal tubercles could be used as a means of sepa- 

 rating groups, but this character has ceased to be of any importance 

 and its use has already been the means of some misunderstanding. 



Occurs from the Middle States to Texas. 



A. iiiqiiiiiatllS Heibst. — Oblong, convex, black, shining, elytra yellowish 

 with black spots and vittie, thorax with anterior angle often the entire side pale, 

 femora yellowish, tibiae darker. Antennae piceous, club nearly black. Head en- 

 tirely black, front trituberculate, disc sparsely punctate, the sides more densely 

 and somewhat rugulose; clypeus very feebly emarginate, the angles broadly 

 rounded, the sides arcuate, gense feebly prominent, obtuse. Thorax convex, 

 slightly narrower in front, sides arcuate, hind angles distinct, but obtuse, base 

 arcuate with fine marginal line, disc convex variably punctate in the sexes. 

 Elytra parallel, humeri distinct, but obtuse ; disc striate, strife finely crenately 

 punctured, intervals feebly % or more 9 convex, with extremely fine punctures 

 near the strise ; color yellow, with two sub-basal spaces of irregular shape on 

 each elytron, another posteriorly, one-third from apex, a lateral stripe piceous, 

 these often more or less confluent. Body beneath sparsely punctate, the abdo- 

 men alutaceous. Mesosternnm alutaceous, opaque, an extremely fine carina be- 

 tween the middle coxse. Anterior tibiae smooth in front, strongly tridentate 

 externally and crenate above, tbe first tarsal joint distinctly shorter than the 

 second. Posterior femora sparsely punctate, alutaceous, the first joint of hind 

 tarsus not as long as the next three. Length .18-. 22 inch ; 4.5-5.5 mm. 



Male. — Head rather sparsely punctate. Middle tubercle of front more promi- 

 nent. Thorax wider than the elytra and very convex, scarcely perceptibly punc- 

 tate at middle a few punctures near the side. Metasternum feebly concave, 

 finely sparsely hairy. Spur of anterior tibia stout, feebly curved, acute at tip. 



Female. — Head more densely punctate. Middle tubercle not prominent. Tho- 

 rax not wider than the elytra and less convex, the surface sparsely, but distinctly 

 punctate everywhere. Metasternum flat. Anterior tibial spur more slender. 



This species is so well known that it is hardly necessary to enter 

 into any detailed description of the style of markings, the spots are, 

 however, variable in size, and often nu)re or less confluent, while 

 they preserve the general type above described. Many details of 

 variation have been described by Erichson (Ins. Deutsch. iii, p. 841), 

 to which those specially interested are referred. 



This species has been introduced from Europe, and is widely dif- 

 fused over our territory east of the Rocky Mountains. I have not 

 yet seen it from the Pacific region. 



