Rey. H. Clark on the Halticide of South America. 389 
gulare: elytra parallela, confuse punctata, flava, hemielytris apicalibus 
nigris marginibus tenuiter flavis: pedes, antenne, et corpus subtus flavi. 
Long. corp. lin. 23, lat. lin. 14. 
D. dimidiata may readily be distinguished from the Rio Janeiro 
species D. nigro-apicata, which resembles it in colour: the antennz 
are entirely pale, the thorax is relatively much broader, and the 
elytra are not punctate-striate, but confusedly punctate. 
Guyana. From the collection of M. Chevrolat. 
Genus PsrrapHa, Clark. 
Lata, satis depressa, parallela. Caput penitus verticale, vix productum. 
Palpi maxillares elongatuli, art. penultimo cylindrico, ultimo producto 
acuminato, Antenne filiformes, elongate, art. 1 versus basin valde 
constricto, et ad apicem inflato elongato (art. secundum longitudine 
superanti), art. 2 brevi, art. 3 secundum articulum penitus triplo longi- 
tudine excellenti, reliqui fere cequales et art. 3 breviores; art. 3, et ob- 
solete art. 4-7, ad apices inflati vel incrassati sunt. Thorax latus, 
elytra amplitudine penitus equans, subquadratus, lateribus undique 
sinuatis et marginatis, ad basin fovea transversa vix margines attinet. 
Scutellum late triangulare. Elytra parallela robusta, post medium a 
latere visa paulum inflata, versus apicem subattenuata, marginata, 
striato-punctata. Pedes robusti, femora antica versus apicem valde 
incrassata, et margine inferiori fortiter emarginata; tébie antics 
paulum incurvate, et versus apicem incrassate, mediz et posticee 
rect; tarsi, art. 2ndo brevi triangulari, 3tio valde bilobo, 4to elongato ; 
unguiculi ab inferiori parte dente brevi utrinque armati. 
A very remarkable form, conspicuous at once by its strangely 
robust anterior femora, and also notable for its largely developed 
thorax, which is as broad as and more than one-third of the length 
of the elytra; the basal transverse groove of the thorax and its 
punctate-striate elytra will place this form next in order to Di- 
phaulaca. 
Psilapha flava. 
P. breviter parallela, punctato striata, flava: caput inter oculos foveola in 
forma W, et altera versus basin transversa arcuata, caput impunctatum : 
thorax margine laterali utrinque rugoso vel punctis obsoletis inzequali- 
bus notato: scutellum impunctatum: elytra brevia versus apicem 
attenuatiora, striato-punctata, punctis sparsis et versus apicem obso- 
letis, nota utrinque transversa brevi post-media fusca: pedes flavi ; 
tarsis fusco-flavis: antenne fusco-flavee, art. 1-30 flavis: corpus subtus 
flavum. 
Long. corp. lin. 2%, lat. lin, 13. 
Thave asingle example of this species from the Marquis La Ferté’s 
collection. New Granada. 
