438 Mr. G. J. Arrow on a 



at present known of the genus, were found in West Africa, 

 and from its form and affinities there is no doubt that the 

 insect lives under the bark of trees and preys upon other 

 insects. It is very distinct generically from any other insect 

 hitherto knowji, although it has evident affinities with several 

 distinct types of Cucujidee. In the shape of the head, the 

 very small size of the eyes, and especially in the reduction of 

 the first tarsal joint, it shows the closest approach to Cucujus, 

 the impressed lines on the head and thorax are like those so 

 characteristic of Lcemophlosus, and the abbreviated elytra as 

 obviously indicate relationship with Inopephis. The differ- 

 ences from all three genera are still more striking, however, 

 than the resemblances. The structure of the tarsi is very 

 different from that found in Apytlio and Pseudino. 



Cucujinus, gen. no v. 



Corpus deplanatura, oblongum. Caput magnum, postice latissimum, 

 postice et lateraliter stria submarginali profunde incisum. Oculi 

 minuti, prominentes. Clypeus brevis, leviter emarginatus. 

 Labrum exsertum, semicirculare. Mandibulae prominentes, extus 

 leviter arcuatse, apice obtuse bifidae. Antenna? moniliformes, 

 articulis primo et ultimo modice elongatis. Pronotum breve, 

 latum, linea sublaterali, postice paulo abbreviata, incisa. Elytra 

 abdomen haud tegentia, postice paulo attenuata. Prosternum 

 latum, haud productum. Coxse 4 anteriores late distantae. 

 Femora omnia lata. Tarsi 4 anteriores 4-articulati, postici 

 3-articulati. 



Cucujinus micrommo, sp. n. 



Testaceus, elytrorumdimidio postico vageinfuscato ; valde depressus, 

 nitidus, ubique minute insequaliter punctulatus, capite post oculos 

 latissimo, pronoto valde transverso, angulis anticis paulo emar- 

 ginatis, postiois toto obsoletis ; elytris quam capitem et pro- 

 thoracem paulo longioribus, sed abdominem haud tegentibus, 

 partim subtilissime striatis, postice paulo attenuatis. 



Long, (mandibulis exclusis) 4-5"5 mm. ; lat. max. 2 mm. 



Uab. W.Africa: Cameroon. 



The rather indefinite dark posterior patch is probably due 

 in part to the transparency of the elytra revealing the wings 

 beneath, and may not be a constant feature. The two speci- 

 mens described are males, and it may be expected that in the 

 female the head and prothovax will prove to be of less exag- 

 gerated size and the hind tarsi four-jointed. 



It is an extremely flat-bodied insect, oblong and loosely 



