252 THE CANADIAN ENTOMOLOGIST. 



basal depression ; lacking the two anterior fove?e ; lateral margin more 

 sinuate ; at middle slightly broader than the elytra at the base ; carina of 

 the hind angles obsolete ; tips of the elytra more acute and prolonged and 

 having a suturai angle equal to one-seventh the length of the elytra ; 

 between the first and second segments of the abdomen there is a distinct 

 suture extending half way to the middle of the body; last segment rounded 

 with the edge eroded-granulate ; the pubescence is a yellowish white. 

 Length 11.8 mm., width 3 mm., at base of elytra and 3.5 mm. behind the 

 middle at the enlargement. The colour of this specimen is slightly oliva- 

 ceous as in the type. 



This species is closely related to those specimens that have been 

 referred to by Dr. Horn (Trans. Am. Ent. Soc, Vol. XVIIL, page 308) as 

 the olivaceous variety of acutipeimis but the form and- the golden pubes- 

 cence should at once separate it from that variety. 



It appears to me that the term "last abdominal segment serrate" has 

 not been hitherto clearly defined or the serrations have escaped notice in 

 many species. In the present species the lower edge of the vertical portion 

 of the abdomen is strongly serrate. The serrations begin near the middle 

 of the last segment where the overhang of the superior part commences to 

 be prominent, and, increasing in coarseness, extends to the smooth apical 

 area where the two edges of the superior portion merge directly beneath 

 the pygidial carina. The inferior portion of the last segment at the tip, 

 which is the part referred to in the previous description, is granulate near 

 the edge. In the females the first four abdominal in the larger specimen and 

 the first three in the other are visible when the specimens are viewed from 

 directly above. In the males only the first two segments are so visible. 



The short grayish pubescence that covers the elytra and thorax in 

 specimens of anxius and related species is here almost invisible except 

 on the apices of the elytra and for a short distance along the suture. This 

 pubescence arises from slight depressions in the furrows between the rugae 

 and is seen to be arcuately decumbent in a lateral view across the elytra 

 toward the light. Under a high-power hand lens it appears as minute 

 silvery points on the elytral disk of this species, By placing specimens 

 with the head toward the light and the body inclined backward toward the 

 observer pubescent spots and apical vittee can be seen on many species 

 that have been described as being without elytral pubescence. 



In conclusion it may be said that the studies in the otiosus and auxins 

 groups have been, so far, rather disappointing, due to the difficulty of get- 

 ting series of both sexes. The only species at all abundant in this locality 

 is otiosus, taken on oak leaves. The olivaceous variety of acutipennis has 

 been encountered quite often on oak, and bilineatus occurs in favourable 

 places on oak sprouts ; but in general the species turn up singly or in 

 pairs, with aggravating slowness. Several very interesting problems are 

 suggested by the material at hand, and more specimens from widely sep- 

 arated localities may present a solution. 



Mailed August 6th. 



