THE CANADIAN ENTOMOLOGIST. 2l 



median ones also transversely confluent, forming in some specimens a 

 black fascia of irregular outline. 



The size and markings of my insect agree wiih the n(^ctor's descrip- 

 tion, and 1 have no doubt that this is the s])ecie.s, but in case it should 

 prove different I propose the name of Estola pida for it. 



Byrsopo/is lajiigera, Bates. — Dr. Skinner, I.e., records the occurrence 

 of this species. I have taken several specimens of this species, but the 

 description of Byrsopo/is ChiJiiiahuce fits our insect better. B. lanigera 

 has the clypeus "sinualim angustato, apice quadratim sublobato, reflexo, 

 tru'ncato," anterior angles of thorax "nuUo modo productis," basal margin 

 subinterrupted, all characters which my specimens do not possess, while 

 B. Chihiiahuce has the clypeus '"triangularis, lateribus leviter sinuatis, 

 apice medio acuminato-reflexo," anterior angles of thorax '' subacutis,' 

 basal niargin '"omnino integro.'' Our insect has all these characters, and 

 I had identified it as that species already. 



Cymatodej-a tricolor, Skinner, I.e. — I have taken several specimens 

 of this species, but in all my specimens the "head and outer third of the 

 thorax" is not dark green, but black or blackish. The colour of the head 

 and thorax is variable. I have one specimen which has the head and 

 thorax reddish-testaceous, and another specimen has the head and the 

 greater part of thorax black, with only the base narrowly reddish. 



My specimens are mounted on cards yet, otherwise I would give here 

 the abdominal, antennal and other characters, so important in this trouble- 

 some genus, which are passed in silence in the description. 



Clerus bimaculatus, Skinner, I.e. — This species is variable in regard 

 to colour. The abdomen is not brown as described, but red, very bright 

 in fresh specimens, and the upper side and. legs in some specimens black 

 or piceous, with the apical part of thorax and base of elytra brownish. 

 The under side is reddish, wiih the metasternum infuscate at middle in 

 some specimens. The spots on the elytra are bright yellow when alive, 

 but changing after death in most specimens to reddish, only in two or 

 three of my specimens the spots remained yellow, but not as bright. The 

 apex of the elytra is clothed with cinereous pubescence, as in inoesius, but 

 having on each side a spot formed by black hairs. 



Polycesta Arizoiiica, n. sp. — Similar to ve/asco, but smaller, thorax 

 not as broad, and only th.e alternate elytral intervals costate. Head 

 slightly convex, nearly flat in the clyi)eal region, coarsely and densely 

 punctate, a short costiform smooth median line. 'Ihorax transverse, 



