NEOSILIA.—CHIUS. 297 
subacutely rounded, the base truncate and about twice the breadth of anterior margin. Scutellum tumid, 
with the base excavated. Corium with the margins almost parallel and strongly pilose. Legs finely but 
thickly setiform. Rostrum reaching the intermediate coxa. 
~ 1. * Neosilia viduata, n. sp. (Tab. XXVII. fig. 21, Silia viduata.) 
Very pale ochraceous; eyes, antenns, two large transverse basal spots to pronotum, scutellum, clavus, interior 
area of corium, inner basal angle and apex of cuneus, and apices of the tarsi, fuscous or black; bases of 
the first and third joints of antenne and apex of the scutellum pale ochraceous; membrane pale fuscous, 
the cellular margins darker and the apex paler; body beneath pale ochraceous, a spot at basal lateral 
angles of prosternum black, margins and apex of abdomen fuscous. 
Long. 5 millim. 
Hab. Panama, Bugaba (Champion). 
2. Neosilia sororia, n. sp. (Tab. XXIX. fig. 2.) 
Head castaneous; eyes black; antenne black, the base of the first joint ochraceous; pronotum black, the 
anterior constriction ochraceous; scutellum black; clavus black, with a central ochraceous spot on each 
side; corium very pale ochraceous, with a black spot near inner angle ; inner margin and apex of cuneus 
fuscous ; membrane pale ochraceous, the cellular margins black, the cellular areas fuscous, and the base 
blackish ; head beneath ochraceous; sternum black, with the anterior margin ochraceous; abdomen pale 
greenish ochraceous, with a lateral segmental row of small fuscous spots; legs pale ochraceous, apices of 
the femora, tibie, and tarsi fuscous. 
Long. 4 millim. 
Hab. Guaremata, Cerro Zunil (Champion). 
3. Neosilia cineracea, n. sp. (Tab. XXVII. fig. 22, Silia cineracea.) 
Cinereous ; eyes and antenne black, the basal joint of the latter cinereous; a central longitudinal streak to 
clavus, a central spot to pronotum, lateral margins of the corium excluding base, outer and inner margins 
of cuneus (the last not reaching base), cellular margins to membrane, and apices of the tarsi fuscous. 
Var. a. The fuscous markings to clavus and corium obsolete or only faintly visible. 
Long. 5 to 54 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 
CHIUS, gen. nov. 
Allied to Neosilia, but differing by the longer head, the eyes not contiguous but some distance from the pronotal 
collar. First joint of the antenna as long as the head, second joint about twice the length of the first. 
Pronotum levigate, with the anterior collar narrower than in Neosilia, the posterior margin concave. 
Scutellum large, strongly deflected from base to apex. Corium with the margins almost parallel but not 
pilose. Rostrum almost reaching the posterior coxa. 
1. Chius maculatus, n. sp. (Tab. XXVII. fig. 23.) 
Very pale ochraceous; eyes, apices of the first, second, and third joints of antennsw, two basal spots to 
pronotum, apex of scutellum, apex of clavus, a spot near each apex of corium, and a spot on each lateral 
margin of membrane fuscous or black. 
Long. 4 millim. 
Hab. Guatemata, near the city (Champion). 
* Since publishing the name “Stlia” on the preceding page, I have found that it is preoccupied (May, 
Moll. 1876); it is therefore better to at once change it to prevent future correction. For the same reason 
and with the same object I now substitute Zacynthus for Zacorus (p. 240), Zoilus for Zopyrus (p. 249), Carmelus 
for Carnus (p. 287), and Annona for Ania (p. 289). 
BIOL. CENTR.-AMER., Rhynch., December 1884. 38 
