302 Mr. M. Burr's Observations on 



form of the pygidium and forceps. It is the only species 

 yet known in which the pygidium is shaped like a blunt 

 cone. 



Sparatta W-signata, sp. n. 



Caput, pronotum, elyti'a, alte atra ; abdomen, pedes, forceps rufa ; 

 antennte ? 15-segmentata3 ; pronotum antice angustatum, jjrozona 

 elevata, metazona deplanata, sulculo medio instructum, utrinque 

 indistincte impressum : elytra atque al;e aterrima, nitida. Pedes 

 rufi, femoribus incrassatis, tibiisque gracillimis. Abdomen rufum 

 nitidum, basi paullo constrictum ; segmentum ultimum dorsale 

 magnum, quadratum, Iseve, medio sulculo indistincto V/-forniato 

 impressum, marginibus sulculis in carinulas indistinctas elevatis. 

 Pygidium vix perspicuum, transverso-ovale. Forcipis bracchia bnsi 

 remota, paullo incrassata et divergentia, triquetra, margine inferiori 

 interno crenulato, tum gracilia, parallela, medio dente acvito armata, 

 deinde margine interno deplanato ac dilatato, irf dentem acutum 

 producto, in tertia parte apicali inermia, incurva, apice acuta, 

 attingentia vel decussata. (^ . 



6 



Long, corporis . . . 9'25-10"5 mm. 

 „ forcipis . . . 3'5-4 „ 



ITab. Mexico {Lucas), 2 ^$ (Mus. Paris) ; one has the 

 left branch of the forceps simple and only partially 

 developed. 



Mecomera weissi, sp. n. 



Caput, elytra, alae atra : corpus, forceps, pedes rufa : antennae 

 15 segmentis ; segmento 3 brevissimo, 4 and 5 brevibus, ceteris 

 elongatus ; segmentis 1-6, 13, 14 rufis, 7-12, 15 nigris : pronotum 

 paullo longius quam latins, margine antico convexo, postico rotun- 

 dato : elytra ampla, lata ; ala? prominentes : pedes unicolores : tarsi 

 segmento primo brevi : abdomen rufum, lateribus nigro-variegatis, 

 segmentis 2 and 3 tuberculo lateral! distincto instructis : segmentum 

 ultimum dorsale magnum, quadratum, margine postico medio tri- 

 sulculato, angulis exterioribus acutis : pygidium breve, transversum, 

 quadratum : forcipis bracchia basi remota, depressa, elongata, sub- 

 recta, sensim incurva, denticulis 2 parvis arnuitis. i^ . 



Long, corporis . . . 11 6 mm. 

 ,, forcipis . . . 3-7 ,, 



Hah. Tonkin, Central, "environs de Tuyen-Quan, 

 vii-ix," 1 $ {A. Weiss, 1901, Mus. Paris). 



