142 '^ Annals Entomological Society of America [Vol.1, 



female the ventral plate is frequently notched at the apex. This 

 rarely occurs in lateralis. 



In color there is little difference. It has the same variable 

 character, and the dorsal picture is often the same. The connexi- 

 vum, however, usually has a small spot on each segment, while 

 in lateralis this rarely occurs. 



It is not widely distributed, and seems to be confined to the 

 mountains. Specimens are at hand from Cal., Utah and Wyo. 



Corizus sidae Fabricius. 



Lygaeus sidae Fabr., Ent. Syst., IV, p. 169 (1794). 



Coreus sidae Fabr., Syst. Rhyng., p. 201 (1803). 



Coreus (Rhopalus) sidae, Guer. in Sagra. Hist, dc Cuba Ins. p. 385 (1857). 



Rhopalus pictipes Stal, Freg. Bug. resa. Ins. p. 239 (1859). 



Corizus sidae Sign., Ann. Soc. Ent. Fr., Ser. 3, VII, p. 95; Stal, Hem. Fabr., I, 



p. G9 (1868). 

 Corizus mexicanus Sign. Ann. Soc. Ent. Fr., Ser. 3 VII, p. 95 (1859). 

 Corizus proxinius Sign., Ann. Soc. Ent. Fr., Ser. 3 VII, p. 96 (1859). 

 Corizus nebulosus Sign., Ann. Soc. Ent. Fr., Ser. 3 VII, p. 98 (1859). 

 Corizus pictipes Stal, Ent. Zeit. XXIII, p. 307 (1862). 

 Corizus anticus Sign., Ann. Soc. Ent. Fr., Ser. 3 VII, p. 99 (1859). 

 Corizus ventralis Sign., Ann. Soc. Ent. Fr., Ser. 3 VII, p. 92 (1859); Distant, 

 Biolog. Cent. Amer. pi. XV, lig. 23. 



Small pointed head; abdomen broad and short. Abdominal 

 picture appearing as a dark band across the middle of abdomen. 

 Length of female, 5.6 to 6.3 mm., length of male, 4.4 to 5.5 mm. 

 Female, w4dth 2.9 to 3.1 mm., male, width 2 to 2.5 mm. 



Head narrowly triangular. Antenniferous tubercles scarcely visible and 

 placed very close to the eyes. Rostral lobes short but well defined. First 

 segment of antennae scarcely reaching apex of the head. 



Pronotum narrowing decidedly anteriorly and quite convex. Transverse 

 suture bordered in front by a tubercular ridge. Scutelkim rather sharply 

 pointed and excavated at the tip. 



Abdomen short and much wider than thorax, narrowing rapidly from fourth 

 segment, and becoming depressed. Genitalia: Dorsal plate in female broadly 

 rounded at the apex. Ventral plate short, uniform in width, posterior angles 

 round. Dorsal plate in male convex, short. Ventral plate much narrower at 

 the middle than at the edges. Wings longer than the abdomen. Pubescence 

 soft on the body and heavier on the legs. Punctuations rather coarse. 



The general color varies from dark brown to gray or reddish yellow, usually 

 rather thickly covered over with very small brown or bright red spots, and often 

 w4th both colors intermingled. The whole insect, especially in the tropics, 

 often has a metallic luster, making it the most beautiful of the genus 

 when viewed under the lens. A dark line begins on the head and extends back- 

 ward on the pronotum, where it widens and is lost. 



The abdominal picture varies greatly, but the first segment is usually darker 

 while the second is light except at its middle where there are frequently three 

 small spots. The third, fourth and fifth are nearh^ always dark, and often black; 

 the fifth having a light spot at its center. The sixth segment is all light in the 

 female and with a dark stripe at its middle in the male. Connexivum light; 

 the third, fourth and fifth segments having each a darker spot which usually has 

 a light spot or line at its center. This latter may be absent, as also the dark 

 spot on the third segment. Sternum black. On the legs, the small spots that 

 cover the body, form well marked rings. 



