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6 Annals Entomological Society of A^nerica [Vol.1, 



DESCRIPTION OF SPECIES. 

 Corizus hyalinus Fabricius. 



Lvgaeus hyalinus Fabricius, Ent. Svst., IV, p. 168 (1794). 



Coreus hyalinus Fab., Syst. Rhyng', p. 201 (1803). 



Corizus hyalinus Stal, Hem. Fab., I p. 68 (1868); Uhler, Geol. Bull. I, No. 5, 



p. 34 (1875); Obs. upon Heter. Hem. of Lower Cal., p. 237 (1895); Sum. 



of Hem. of Japan, Pres. to U. S. Nat. Mus. by Prof . Mitzukuri (1896); List. 



of Hem. Heter. of Las Vegas Etc., from Proc. U. S. Nat. Mvis., XXVII, 



pp. 349-364 (1894); On Hem. Heter. of Grenada, W. I., pp. 180-181 (1894); 



Oshanin, Verzeichnis Der Palearktischen Hemiptern. I, p. 227 (1900). 



An easily recognized species, with adbomen truncate in 

 female and rounded in male. Trans\-erse suture prominent and 

 black, lateral borders of pronotum light. Length of female, 

 5.7 to 6.4 mm., width 2.3 to 2.5 mm., male, length, 5.5 to 5.8 mm., 

 width 1.8 to 2 mm. 



■ • Head triangular, narrowing from the eyes forward. Antenniferotis tuber- 

 cles not prominent. Rostral lobes well marked, not thickened at extremities. 

 Eyes prominent. First segment of antennae not reaching ajaex of head. 



Pronotum: Transverse suture very wide and close to the anterior border. 

 Scutelluin with lateral borders almost straight and slightly elevated except at 

 the tip, which is not excavated, and a poorly defined ridge throughout its length. 

 Abdomen truncate in female and rounded in male; decidedly wider than the tho- 

 rax especially in the fem.ale. Wings longer than the abdomen. Pubescence 

 not abundant and punctuations small. 



Color: The color of this species varies exceedingly, even in individuals 

 taken in the same locality, though the markings are quite constant. In general, 

 the ground color may be said to be a pale yellow, though this varies to red on 

 one hand and to dark brown or black on the other. 



Head: Transverse line across the base, a curved line baclavard and down- 

 ward from the eyes, irregular lines between the eyes and rostral sutures, black. 

 Antennae 3'ellow or brown, pointed with black dots which on the upper svirface 

 are sometimes confluent, forming a black line. 



Pronotum: Transverse suture, posterior angles, and punctuations except 

 on lateral borders, black. This arrangement of color produces the lighter 

 colored borders, which are so characteristic of this species. Scutellum same as 

 pronotum, with the elevated ridges usually, and the apex always, of a lighter 

 color, usually yellow. 



Abdomen: Above, black with several light spots on or near the median 

 line. Connexivum red or yellow, sometimes with a dark spot on each segment. 

 Sixth segment black, with live yellow or reddish spots on the margin in the male, 

 and with margin entirely yellow in the female. This margin is somewhat wider 

 at the apex. Wings hyaline, nerves yellow or reddish. Apex of coreum usually 

 red or brown. Entire under side vellow or reddish, except sternum, which is 

 black. 



This is a cosmospolitan, tropical and sub-tropical species, 

 extending as far north in America as South Dakota and Iowa, 

 and south into Mexico, Middle America and the West Indies. 

 It is one of the most common southern European species, and is 

 found south as far as Cape Colony in Africa, and Australia, and 

 has been reported from the Philippines. Specimens are at hand 

 from Colorado, Arizona, Mississippi, Mexico, Wyoming, South 



