130 GEO. H. HORN, M. D. 



From the umbone a moderately wide stripe extends nearly to apex ; 

 this stripe is often interrupted. Near the suture are four subquad- 

 rate spots arranged in a quadrangle ; near the apex are two smaller 

 spots. 



The variation from this observed are as follows : The larger spots 

 forming the quadrangle may be divided longitudinally, producing 

 two linear spots in the place of one. On the other hand, these spots 

 may be longitudinally confluent, so that the two on each elytron form 

 a short vitta. Specimens may occur witli pale elytra with merely a 

 small scutellar triangle and a small humeral black spot. 



This insect is widely distributed. Specimens are known to me 

 from Canada, Kansas, Texas, North Carolina and New York. None 

 have been reported from the New England States. 



A]\I>RE€TOK Horn. 



Head free, front vertical, a deep transverse depression just beneath 

 the eyes. Antennae more than half the length of the body, first 

 joint long, second very short, third longer than the first, dilated and 

 emarginate at apex, fourth triangular, with an emargiuation, the free 

 angle acute, joints 5-11 nearly equal in length; maxillary palpi 

 stout, the last joint conical, shorter than the preceding and slightly 

 narrower at its base ; anterior coxse contiguous, their cavities closed 

 behind; epipleurae extending three-fourths to apex. Legs as in 

 Cerotoma, the posterior and middle tibiae with spurs ; posterior tarsi 

 with first joint as long as the three following united ; claws broadly 

 appendiculate at base. 



Above the deep transverse depression of the front and below the 

 insertion of the antennae, is a short laminiform prolongation, obtusely 

 tridentate, the lower edge of the depression has, at middle, an ob- 

 tusely conical elevation. 



By the characters above given it will be seen that the genus is a 

 member of the group Cerotomites, as defined by Chapuis. As in 

 Cerotoma the third joint is longer than the fourth. It differs from 

 that genus in the presence of tibial spurs on the middle and hind 

 tibiae, and by the deep, transverse depression of the front. 



In the " Catalogus" Baron Harold has placed this genus in syn- 

 onymy with Cerotoma, but in view of the characters considered valid 

 for generic separation this course cannot be followed. 



One species is known to me. 



A. sexpimctalus Horn, Trans. Am. Ent. Soc. iv, p. 152. — Obloug-oval, 

 narrower in front, pale yellow above and beneath, each elytron with three small 



