188 HEMIPTERA-HOMOPTERA. 
Group 4. 
The insects belonging to this group have a very distinct facies, as a rule, although 
I. imperans is, perhaps, a somewhat intermediate species. There is no tangible 
character on which to separate them generically. They appear to be very variable in 
colour. 
32. Tomaspis imperans, sp.n. (Tab. XI. figg. 25, 25a; 26, var. seanotata.) 
Oblonga, sat angusta, sat nitida, nigra, capite, pronoto (disco fusco excepto), scutello, basi limboque marginali 
tegminum ante apicem abrupte terminato, sanguineis; metopidio producto; pronoto longitudine duplo 
latiori, nitido, remote et haud profunde punctato; tegminibus dense subtiliter punctatis, apicibus sat 
fortiter rugoso-reticulatis ; corpore subtus piceo, metasterno rufo, abdomine pedibusque nigris. 
Oblong, parallel, black, with the head and metopidium (which is produced) scarlet; pronotum twice as broad 
as long, shining, somewhat diffusely and distinctly punctured, scarlet, with the disk dark to the sides; 
scutellum large, finely rugose, unicolorous scarlet; tegmina black, with the base and a broad marginal 
band ceasing abruptly a little before the apex scarlet, the colour being very distinctly marked, the 
punctuation very close and fine, the apex plainly rugose-reticulate ; underside dark, the metasternum red ; 
legs black. 
Long. 10 millim. ; lat. max. 44 millim. 
Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
Var. sexnotata. 
Colore nigro, differt basi pronoti sat late, lateribus anguste, apice tantum scutelli, et tribus maculis tegminum 
utrinque sanguineis. 
Black, with the base of the pronotum broadly and the sides narrowly scarlet; the apex only of the scutellum 
is of the same colour, and the scarlet marginal band of the tegmina is replaced by three spots on each 
side—one at the base, one before the middle, and the third behind the middle. 
Long. 10 millim, ; lat. max. 44 millim. 
Hab. Panama, Bugaba, Volcan de Chiriqui 2500 to 4000 feet (Champion). 
33. Tomuspis assimilis. (Tab. XI. fige. 27, 27a; 28, var.) 
Sphenorhina assimilis, Walk. List of Homopt. Ins., Suppl. p. 182 (1858) °. 
Tomaspis varians, Stal, Stett. ent. Zeit. xxv. p. 65 (1864) °. 
Hab. Mexico (Sallé+), Omilteme, Xucumanatlan, and Sierra de las Aguas Escondidas, 
all in Guerrero, 7000 to 8000 feet (AH. H. Smith), Orizaba (Bilimek, in Mus. Vind. Ces.), 
Oaxaca (Mus. Holm.?; Mus. Brit.); Guatemaua, San Gerénimo (Champion). 
Stal enumerates four varieties of this species. In the type form the head and the 
front of the pronotum are red, and the hinder part of the latter, except the posterior 
margin (which is dark), is light testaceous; the tegmina are dark, with a light 
testaceous longitudinal subcostal stripe, which is curved and enlarged in front and 
behind and almost encloses a dark oval space divided by the suture; this band, 
however, varies and is often quite straight and not thickened behind; the colour of 
the head and pronotum is also variable. A single specimen from San Gerénimo in 
