TYCHINI 281 



indrical, only shorter than eleventh ; II ovate, smaller than first but only shorter 

 than first, tenth or eleventh; III minute, obconical; IV-VI gradually, slightly 

 wider but subequal in length to third, transversely moniliform; VII abnormal, 

 very transverse, wider than any segment save last two, with the mesial face pro- 

 duced, of a yellow color (glandular?) ; VIII and IX pyramidal; X trapezoidal; 

 XI not much wider than tenth but almost as long as preceding four united, 

 shaped as in Anoplobraxis. 



Pronotum obviously transverse, formed as in Dalmonexus. 



Elytra perfectly simple, as in Anoplobraxis save that the sutural striae are 

 strongly developed. 



Wings long, well-developed, iridescent, fringed with long setae. 



Abdomen with five visible tergites in a length ratio of 2/.6/.5/1/.6 with 

 margins well-formed on sides of first tergite, consisting of two high, parallel, 

 straight, subentire carinae. 



Six sternites in a length ratio of .6/1.3/.3/.3/.4/1 and unmodified save that 

 first sternite has a circular pubescent fovea between posterior coxae. 



Posterior coxae not distant, separated by a distance equal to one-third of 

 the median metasternal length. Intermediate and posterior trochanters each 

 armed with a long translucent spine on the ventral face. Tarsi as described for 

 genus. 



Allotype Female. Similar to holotype save that (1) occiput is simply me- 

 dianly indented instead of sulcate; (2) vaulted vertex simply declivous to a 

 point opposite the lateral incisures and wholly unarmed. Despite this simplified 

 field the vertexal foveae are not discernible as such; (3) Antennae perfectly 

 simple, the seventh segment small and intermediate in size between the sixth 

 and eighth and the distal segment much more ovoidal; (4) Trochanters un- 

 armed. 



Described on two specimens collected by the author on Barro Colorado 

 Island, Gatun Lake, Panama Canal Zone, from beneath bark. The holotype on 

 July 27, 1936, at Zetek 23 and the allotype on July 26, 1936, at Zetek 0. 



Batrybraxis bowmani new species 



Type Male: 0.90 mm. long; 0.47 mm. wide; antennae 0.43 mm. 



Yellow with shining, sparsely punctulate integument; pubescence short and 

 erect on head, long and semierect on pronotum and elytra, subappressed on 

 abdomen; no temporal beard. 



Head one-fourth wider than long; tempora prominent, longer than wide, 

 nearly rectangular; eyes as long as tempora, median, much less convex and 

 prominent than in panamaensis, reniform, composed of 28 facets. Occiput 

 broadly, medianly indented but not sulcate. Vertex vaulted above eye-line, the 

 tumidity being deeply, simply, medianly excavated with each side of the ex- 

 cavation erected into a strongly arcuate cornuate cusp, and the vaulted area 

 sharply declivous each side at antennal base. At this latter point each lateral 

 margin is obliquely, deeply, narrowly incised in the usual pubescent, parallp' 



