202 U.S. NATIONAL MUSEUM BULLETIN 261 



Homalodisca noressa, new species 

 Figure 183 



Length of male 10.7-11.4 mm. Head with median length of crown 

 equal to interocular width, disc rounded to face anteriorly, with a very 

 weak M -shaped elevation bordering posterior margin, disc with short 

 pubescence which is not very distinct; clypeus very slightly depressed 

 medially, muscle impressions distinct. Thorax in lateral aspect with 

 dorsopleural carina complete. Forewing hyaline, with sclerotized areas 

 near bases of outer two anteapical cells, without supernumerary cross- 

 veins between veins M and Cui- Hindlegs with femoral setal formula 

 2:0:0 or 2:1:0; first tarsomere with length less than combined length 

 of second and third tarsomeres. Male pygofer short, obliquely truncate 

 apically, ventral process poorly developed; plates rounded apically, 

 not extending nearly as far posteriorly as pygofer apex, short, triangu- 

 lar; style with distinct preapical lobe, apical portion elongate and 

 rounded at tip; connective T-shaped, the stem narrow and strongly 

 carinate ; aedeagus with three pairs of processes, the dorsal pair slender, 

 straight and tapering, the intermediate pair arched strongly posteriorly 

 and ventrally in lateral aspect, the ventral pair angulate and shorter 

 than the other two pairs. Color of crown, pronotum and basal portion 

 of scutellum brown irrorate with dull white, apex of scutellum con- 

 spicuously yellow; sclerotized portions of forewings dark purplish; 

 venter and legs dull yellow. 



Holotype male. El Valle, Venezuela, Oct. 6, 1938 (C. H. Ballou), 

 and one female topotype, March 23, other specimens, Caracas, on 

 Nerium oleander, May 19; Boca del Rio, July 9, on cotton; Carabobo, 

 April 30, on Gliricidia sepium; Antimano, D. F., July 12, on Spathodea 

 campamlata; all in Venezuela (USNM). Three males from Maracay, 

 Venezuela (SSM); two specimens, Sevilla, Colombia (USNM); and 

 one male, Carara, Colombia (ZIMH). 



This and H. triquetra (Fabricius) are the only species in the genus 

 having three pairs of aedeagal processes. The basal pair of processes 

 is very gready reduced, comparatively, in H. triquetra and the inter- 

 mediate pair is not arched and decurved as in H. noressa, new species. 



Homalodisca cornuta, new species 



Figure 184 



Length of male 12.0 mm.; of female 12.1 mm. Head with or without 

 weak M -shaped elevation bordering posterior margin, otherwise as in 

 H. noressa, new species. Thorax in lateral aspect with dorsopleural carina 

 incomplete, ending distinctly behind eye. Forewing as in H. noressa but 

 with one supernumerary crossvein between M and Cuj in type (not in 



