ROLAND HAYWARD, 129 



120. B. iridewceiis Leo. — Smaller aiul broader than frechiforme : color 

 blnish black, iridesceut, shiniug, the elytra usually rufescent at apex. Head as 

 wide as the thorax at apex ; palpi rufous, darker towards the tip : auteniife about 

 one-half as long as the body, piceous, the first joint rufous, as are often also the 

 second and third at base. Prothorax trapezoidal, about one-half wider than long, 

 as wide at base as apex, sparsely punctate at base; apex slightly emarginate: 

 median line distinct, subentire or abbreviated in front; transverse impressions 

 moderately distinct ; basal impressions broad, deep, bistriate ; sides with the mar- 

 gin distinctly retlexed, arcuate in front, sinuate behind ; hind angles rectangular, 

 carinate. Elytra about one-half wider than the thorax, oblong-ovate, moderately 

 finely striate, more finely at sides and tip; striaj obsoletely punctulate, the five 

 inner entire, the fifth grooved at apex; intervals nearly flat, the third with the 

 first dorsal puncture about one-third from base, the second about one-third from 

 apex. Beneath black, sometimes slightly teneous, shining. Legs yellowish testa- 

 ceous. I^ength .15-.18 inch ; 3.75-4.5 mm. 



More abundant than the preceding, from which it may he distin- 

 guished by the above characters. 



It occurs in Utah, Montana, Idaho, Nevada, California, Oregon, 

 Washington and Vancouver Island. 



Group XX. laticeps. 



Mandibles moderately stout, slightly arcuate. Maxilhe with the 

 outer lobe distinctly biarticulate ; frontal stride single, moderately 

 deep, parallel ; eyes small, flattened. Elytra with the humeri 

 rounded ; two dorsal punctures on the third stria. 



The above-mentioned characters are sufficient for the definition 

 of this group, wdiich is the equivalent of the genus Lymmeimi. The 

 species agree with those of the next in having the eyes small and 

 flattened, but are distinct by the form of the mandibles, the biar- 

 ticulate outer lobe of the maxillie, and the position of the dorsal 

 punctures of the elytra. 



But two species are known to me, both very rare in collections. 

 They may be thus defined : 



Thorax about one-half wider than long, basal impressions moderately deej) : 

 elytra oblong-ovate, slightly wider than the thorax, deeply striate, the 

 strife entire. Length .16-. 17 inch pnritaiiiiin n. sp. 



Thorax slightly wider than long, basal impi-essions very shallow; elytra nearly 

 elliptical, scarcely wider than the thorax, finely striate, the outer strise 

 indistinct, the first, second and fifth entire, the others rriore or less efl^aced 

 at tip. Length .14-. 16 inch laticeps Lee. 



121. B. piiritaiilltii n. sp. — Form elongate, depressed ; color dark rufous, 

 the elytra varying to slate color with a narrow line along the suture rufous. Head 

 large, as wide as the thorax at apex : palpi rufous; antennse about one-half as 

 long as the body, rufous. Prothorax subtrapezoidal, about one-half widei' than 

 long, very distinctly narrower at base tiian apex; apex truncate; median line 



TRANS. AM. ENT. SOC. XXIV. (17) MAY. 1897. 



