278 
HORN EXPEDITION—COLEOPTERA. 
protlioracis })asin vix attingentibus, articulis 1° 2° que parvis (liis coiijuiictis quam 
3”® sat brevioribus), articulis 4o-6° gradatiiii brevioribus quain latioribus (4° inulto, 
6° paullo) loiigioribus (4° 5° que conjuuctis 3° loiigitudiue sat lequalibus), 
7°-10'’ transversis gradatiiii paullo brevioribus (7° 8° que et 9° 10° que loiigitudiue 
lequalibus, sed bis quam illi paullo angiistioribus), 11° obovato quam 10°® sat 
loiigiori; elytris ut JV. cmssiconiis; femoribus tibiisque baud tomentosis ; prosterno 
ut N. crassicornis. Long. 6 1. Lat. 3^^'^ 1. 
Notwithstanding its great resemblance to the preceding two species, this one 
presents characters inconsistent with its being conspecific, especially in the 
structure of its antenme. Regarding the transverse joints of the antennie as 
forming with the last joint a kind of loose “ club,” this club in crassicornis is six- 
jointed, in mceqiialis live-joiiited, and in approxiinatiis four-jointed. The present 
species also differs from both the preceding in its head and pro thorax being more 
closely and much more distinctly (partly I think through its greater opacity) 
punctured. The absence of tonientosity on its legs associates it with approxi/nalus, 
while in most of its other characters it is nearer crassicornis. 
Illamurta. 
N. irregularis., sp. nov. (1), Fern. ? Sat opacus, partibus elevatis pedibusque 
sat nitidis ; niger, antennis pedibusque picescentibus ; capito prothoraceque leviter 
sat crebre sat perspicue punctulatis; oculorum orbitu extus rotundato ; antennis 
protlioracis basin manifeste superantibus, articulis 1° 2° que parvis (his conjuuctis 
quam 3°® multo brevioribus), articulis 4o G° gradatiiii brevioribus quam latioribus 
(4° multo, 6° paullo) loiigioribus (4° 5° que conjuuctis quam 3°® sublongioribus), 
7° -11° ut Al incequalis ; prothorace parvo modice transverso (quam longiori diniidia 
parte latiori), antice leviter angustato, ad latera minus late deplanato, marginibus 
lateralibus leviter incrassatis baud recurvis leviter (pone medium vix sinuatim) 
arcuatis, angulis omnibus acutis, disco paullo imequali utrinque ad medium fovea 
perniagna obsoleta impresso et obsolete longitudinaliter canaliculato; elytris costis 
angustis nitidis reticulatim (harum nullis longitudinaliter continuis) ornatis, pone 
scutellum triangulariter depressis, costarum interspatiis coriaceis nullo niodo 
rugulosis ; femoribus tibiisque glabris; prosterno inter coxas leviter 2-sulcato 
(sulco intermedio omnino carente); abdomine subtiliter creberrime subrugulose 
punctulato. Long. 7|- 1. Lat. 44 1. 
This species may be at once distinguished from all its described congeners 
having costate elytra by the entirely reticulate character of its elytral sculpture, 
none of the costse presenting any appearance of being continuously longitudinal ; 
the finely rugulose sculpture of its under surface (making the under surface much 
