290 ■ Memoirs on the Coleoptera 



The species described by Horn as Calleida platynoides, from 

 Visalia, California, also belongs to this genus, but differs very 

 much from either of the two preceding in the position of the pos- 

 terior dorsal puncture of the elytra, which is said to be at apical 

 third. The lateral thoracic margins are said to be "rather wide 

 and slightly refiexed," which is not suggestive of the broadly and 

 strongly refiexed margins of the two here described. It is further 

 probable, from the language used and comparisons made, that 

 platynoides is not so elongate as these species, having more the 

 outline of Anchomenus hicoloratus G. & H. It is also highly prob- 

 able that the Calleida platynoides, announced by Bates as occurring 

 in northern Sonora, is one of the present two species and not the 

 true Californian platynoides. The sides of the metasternum have 

 some sparsely scattered punctures, extremely minute in pimalis, fine 

 but more evident in nigritula. 



Zacotus Lee. 

 In this remarkably isolated genus the body is slender and very 

 convex, glabrous, shining, with basally constricted prothorax, 

 thick antennae and evenly rounded elytral tips, without trace of 

 sinus. A small series of matthewsi, from Clackamas Co., Oregon, 

 and Moscow, Idaho, seems to indicate that the female is somewhat 

 more slender than the male, where the three basal joints of the 

 anterior tarsi are well dilated. The following species, from southern 

 Oregon, is decidedly more slender than matthewsi: 



Zacotus angustus n. sp. — Very elongate, narrow and convex, mod- 

 erately shining, with violet lustre, the under surface and legs deep 

 shining black; head four-fifths as wide as the prothorax, with rather 

 prominent eyes; surface very coarsely rugose, broadly, longitudinally 

 biimpressed from apex nearly to the posterior line of the eyes; epistoma 

 large, truncate, the suture distinct; mandibles small, hooked at tip; 

 maxillary palpi stout, the last joint much longer and broader than the 

 third, widest and truncate at apex; antennae fuscous, thick, submonili- 

 form, extending to about basal third of the prothorax, the joints after 

 the third equal in length, two-thirds longer than wide and swollen at 

 their apices, the last joint fusiform, pointed at tip; prothorax a fourth 

 longer than wide, the sides broadly, subevenly arcuate and finely refiexed, 

 the basal constriction abrupt, thence parallel to the obtuse angles; base 

 evenly arcuate, narrower than the truncate apex having rounded angles; 

 surface with strong and well spaced, transverse rugulae; anterior trans- 

 verse impression wanting, the posterior feeble, the median stria deep 

 and impressed, greatly biabbreviated, the fove^ wanting; scutellum 



