MICRUTALIS.—POLYGLYPTA. 121 
insect may be known by the entirely hyaline tegmina and distinct dark veins; the 
central basal area is so strongly petiolate that it appears almost as a discoidal area. 
11. Micrutalis albivitta, sp. n. 
M. lugubrine, var. parallele, maxime affinis, sed pronoto densius punctato et vittd distincté albida mox ante 
apicem instructo, cetera nigro; tegminibus, apice excepto hyalino, nigris coriaceis, venis partem corlaceam 
haud superantibus; abdomine pedibusque nigris, his partim brunneis. 
Very like M. lugubrina, var. parallela, but easily distinguished by the very distinct white band running across 
the pronotum just before the apex, which is the only marking on the upper surface, except a very small 
line at the margin near the shoulders (usually present in most of the species of the genus), and especially 
by the fact that the venation of the tegmina appears to be confined to the coriaceous portion. 
Long. 4 millim. ; lat. int. hum. 2 millim. 
Hab. Mexico, Cuernavaca (Bilimek, in Mus. Vind. Ces.). 
Apparently quite distinct from M. lugubrina. 
Besides the species of Micrutalis above described or noticed, there is in the Vienna 
Museum an example from Mexico labelled “flaviceps, det. Stal” (apparently a MS. 
name), which appears to be a very small variety of 1. malleifera, with the apical part of 
the pronotum darker. ‘There is also among the undetermined insects in the Stockholm 
Museum a Micrutalis which, at first sight, superficially resembles M. albivitta, but is 
differently shaped and sculptured, and very distinct by reason of the hyaline tegmina 
and dark veins, and the presence of a small area behind what usually constitutes the 
central petiolate basal area, which latter, therefore, in this case becomes properly 
discoidal; the insect, however, is imperfect, and I have therefore not described it. 
In the ‘ Bidrag till Rio Janeiro-Traktens Hemipter-Fauna’ (pp. 32, 33) Stal describes 
seven species of the genus Acutalis (A. plagiata, geniculata, semipallida, semialba, 
modesta, lugubrina, and mesta), apparently from single insects or very small series, for 
he mentions the female only of six, and the male only of one, and he adds the note, 
“ Non nisi coloribus inter se differunt fere omnes species hic descripte ; forte tantum 
varietates, quod melius docebit experientia.” ‘The series in our collection helps to clear 
up certain points, but very probably when a still larger amount of material has been 
obtained some of the species above described may have to be united together. 
POLYGLYPTA. 
Polyglypta, Burmeister, Handb. Ent. ii. 1, p. 142 (1835); Fairmaire, Ann. Soc. Ent. Fr. sér. 2, iv. 
p. 296; Stal, Ofv. Kongl. Vet.-Ak. Forh. 1869, p. 240. 
Numerous species have been described as belonging to this genus, which appears 
to be confined to Central America and the north-western portions of South America. 
They are elongate insects, of a black, brownish, or straw-colour, with the pronotum 
produced into a point before and behind, and they closely resemble the long grains of 
certain cereal plants, their likeness to which appears to be protective. A considerable 
BIOL. CENTR.-AMER., Rhynch. Homop., Vol. II., December 1895. *16 
