116 GEO. H. HORN, M. D. 



angles less broadly rounded than in dimidiaius. Elytra slightly longer than 

 wide, rufous, sutural and lateral series of punctures fine, dorsal series obsolete. 

 Abdomen pitchy black, apical half of the fifth and sometimes the sixth rufous, 

 sparsely punctured and pubescent. Body beneath piceous, abdomen sparsely 

 punctured, legs and anterior coxae testaceous. Length .28 inch; 7 mm. 



Jlfa^e.— Anterior tarsi strongly dilated. Last joint of antennae as long as the 

 two preceding. Seventh ventral segment slightly prolonged at tip and with 

 fine spinules near the tip or arranged sparsely along each side of the middle of 

 the segment, sixth ventral with a feeble emargination at middle. 



Female. — Tarsi not dilated. Last joint of antennae slightly longer than the 

 preceding. Ventral segments simple. 



This species corresponds so closely with the descriptions that I feel 

 unwarranted in giving it a distinct name.* The antennae are more 

 slender than any of the preceding species but more robust than those 

 which follow. The palpi seem almost identical with those of Bn/o- 

 porus. The sculpture and general appearance are however that of 

 BoUtohiuH. It is naturally intermediate between the Mcgacronus 

 group of the genus and the maculate species as well as with the two 

 preceding, exhibiting a tendency to Brijoporus.* The variable color 

 of the thorax is independent of locality. Two from Canada are black 

 and rufous, and from British Columbia and Oregon also similar, and 

 two others from Pennsylvania, one is black the other rufous. 



B. ciiicticolliii^. Say. — Piceous shining, base and sides of thorax testa- 

 ceous, elytra rufo-testaceous with large black spot on each of variable size, legs 

 testaceous. Head oblong oval, black, shining. Antennae slender, longer than 

 the head and tliorax, piceous, three basal joints testaceous. Palpi slender, long. 

 Thorax black, shining, sides and base narrowly, hind angles more broadly 

 testaceous, not broader than the elytra, hind angles obtuse but not broadly 

 rounded. Elytra slightly longer than wide, j'ellowish testaceous, a large black 

 spot near the outer angle not attaining the apical margin but nearly always 

 extending upon the epipleurae; sutural and lateral series of fine punctures, 

 dorsal series nearly obsolete. Abdomen piceous, the hind margin of each 

 segment paler, sparsely punctured. Legs and anterior coxae testaceous. Length 

 .14 — .22 inch; 3.5 — 5.5 mm. 



The sexual characters are not apparent. 



Variations occur in the color of the thorax but nothing is seen to 

 disturb its general character. The elytral spot varies in magnitude, 

 and in one specimen from California the spot is small and round 

 and distant from the sides and apex. In specimens with the abdo- 

 men g*"eatly extended there is a conspicuous pale band, formed of 

 the apical third of the sixth and the basal third of the seventh 

 segments. 



* Since the above was written I have received specimens from M. Salle of the 

 European form and find them identical. 



