50 COLEOPTERA OF NORTI[ AMERICA. 



entire, not interrupted posteriorly without internal plica. Pro- 

 sternum not prolonged. Mesosternum obtuse in front, rather 

 widely separating the coxfE, the epimera distinct, broader e.\- 

 ternally. Metasternum short, body apterous, epimera distinct, 

 posterior coxas slightly separated. Legs rather slender, middle 

 tibiis slightly spinulose externally near the tip, anterior tibis 

 moderately dilated, emarginate internally, the inner spur at the 

 upper angle of the notch. Tarsi slender, the fourth joint simple. 



The males have four joints of the anterior tarsi quadrangularly 

 dilated, the first three with squaniiforni papillae beneath, the 

 middle tarsi are not dilated, but the first two joints are squamu- 

 lose beneath. 



In size and general appearance (except the head) Zacotus re- 

 sembles Pfomecoderus concolor Germ., and seems to form a 

 tribe with nearly equal relations with t!ie Broscini and Peleciini, 

 and to indicate that these two tribes are far more closely allied 

 than has been yet admitted. 



But one species, Z. Matthervni Lee, occurs in Washington 

 Territory and Vancouver. It lives near small streams in dense 

 woods ; the color is piceous with bright aeneous or cupreous 

 surface lustre. 



Tribe XXXI.— CHt^iElVII^I. 



Antenna; slender, rarely slightly compressed (Evolenes) arising 

 under a slight frontal ridge, the three basal joints glabrous. Head 

 not narrowed behind the eyes to a neck, one supra-orbital seti- 

 gerous puncture. Clypeus more or less prolonged between the 

 mandibles, often without the lateral seta. Eyes oval, moderately 

 prominent, more truncate behind in the Oodes. Labrum trans- 

 verse, truncate, or emarginate, with three,, four, or six setoe in 

 front. Mandibles feebly arcuate, without setigerous puncture 

 externally. Maxillie slender, hooked at tip, ciliate or spinous 

 within, the outer lobe usually slender, biarticulate (except in Cal- 

 lislus) ; the palpi moderately long, the terminal joint variable in 

 form. Mentum broad, usually emargiimte and toothed, some- 

 times feebly bisinuate in front (Ecole7)es) or even almost truncate 

 {Brachylohua), the basal suture always distinct; ligula moderately 

 prominent, usually free at tip and bisetose, the paraglossfe mem- 

 branous more or less free at tip, longer or not than the ligula, 

 elongate and slender in Anomogloasus and ciliate within ; palpi 



