1932 ] 
Notes on the Genus Dysdercus 
123 
weeds of the genus Sida (Malvaceae), which are common 
along the sides of roads and traces and in other rather 
exposed and dusty situations. With the exception of one 
occasion on which a number of migrants of D. maurus Dist. 
were found, D. mimus was the only species ever taken on 
Sida and indeed it was unusual to find an association of 
these plants which did not support a small colony of the 
species. 
D. mimus is a much rarer species in Trinidad than either 
D. howardi or D. maurus. 
Dysdercus fernaldi Ballou 
Dysdercus fernaldi Ballou, West India Bull., VII, 68 
(1906). 1 
The head, antennse, except the basal eburneous ring of 
the ultimate joint, rostrum, legs, anterior callus and lateral 
flanges of the pronotum, rufous (9’) ; the color of the lat- 
eral flanges encroaching onto the sides of the posterior 
disc of the pronotum, which is pale luteous (21”d), with a 
sub-basal fuscous margin, itself posteriorly narrowly al- 
bido-limbate ; hemelytra buff -yellow (19”d) : abdominal 
sternites, epimera, acetabula and the pronotal collar, eburn- 
eous; scutellum, episterna, the lateral flanged margins, the 
incisures, very narrowly, the whole of the fifth and the 
anterior half of the sixth visible sternites of the abdomen, 
orange-rufous (11’) ; the membrane fuscous, narrowly al- 
bido-limbate. 
Clavus and corium thickly punctate, anterior collar and 
posterior disc of the pronotum, epimera and acetabula, 
more sparsely punctate, rest of the body impunctate. 
Rostrum reaching to the middle, if not to the posterior 
margin of the third visible abdominal sternite. 
The male parameres with the shaft in the form of a 
prism, of which the ventral surface is hollowed out and 
the dorsal ridge is extended distally to form a long, down- 
ward curving, cowl-shaped structure, of which the outer 
edge is toothed like a saw and bears at the proximal end a 
long, curved spine. 
Length, from the apex of the clypeus to the tip of the 
membrane of the hemelytra X Maximum breadth of the 
pronotum : 
