Rey. H. Clark on the Halticidee of South America. 397 
cyaneis: corpus subtus flavum: pedes flavi; tibiis tarsisque nigris: 
antenne nigre, art. 1 interdum flavescente, et 10 et 11 albidis. 
Long. corp. lin. 3, lat. lin. 13. 
There is some variation of colour in the antenne of this species, 
occasionally the last joints of the antenne are white. 
Taken by Mr. Bates at Obydos, Amazons; received also from 
Cayenne and Brazil. 
Lactica basalis. 
L. lata, depressa, subtiliter punctata, rufo-flava, elytrorum basibus nigro- 
fuscis: caput haud foveolatum, impunctatum: thorax fovea basali lata 
et profunda, impunctatum: sewtellum flavum: elytra lata, subtiliter 
punctata, rufo-flava, plaga maxima utrinque ad basin subquadrata 
basin sed neque suturam neque marginem attinente, nigro-fusca: 
corpus subtus flavo-fuscum : pedes flavi, posticis interdum flavo-fuscis : 
antenne flavee. 
Long. corp. lin. 3, lat. lin, 14. 
Obydos, Amazons, Taken by Mr. Bates. 
Lactica semingra. 
I. robusta, satis depressa, obsolete punctata, nitida, flava, elytris ad apicem 
nigris: caput ad frontem fovea utrinque obliqua, impunctatum : thorax 
impunctatus, nitidus: scutellum flayum: elytra robusta, subtiliter et 
sparsim punctata, flava, hemielytra apicalia nigra: corpus subtus flavum, 
abdomine interdum fusco: pedes et antenne flavi. 
Long. corp. lin. 3, lat. lin. 13. 
Taken by Mr. Bates at Ega, Amazons. 
Lactica pallida. 
L. pallide testacea: caput fronte nigro: thorax impunctatus: seutellum 
flayo-testaceum ; elytra parallela satis depressa subtilissime punctata : 
antenne flav, vel articulis mediis (4-8) nigro-fuscis : pedes et corpus 
subtus flavi. 
Long. corp. lin. 3, lat. lin. 1. 
Uniformly of a pale flavous colour, the front of the head being 
black ; in this as in other species, the antenne manifest the greatest 
tendency to variation, I have two examples before me from the 
same locality, of these one has its antenne entirely pale flavous, 
the other has the fourth to the eighth joints black. 
Taken at Ega, Amazons, by Mr. Bates. 
Genus Trwosts, Clark. 
Elongata, parallela. Caput penitus verticale, vix productum. Palpi 
maxilares cylindrici, art. ultimo elongatulo. Thorax transversus, sub- 
