200 THE UNIVERSITY SCIENCE BULLETIN. 



Key to Ambrysus — concluded. 



equal to or imperceptibly longer than the 

 head on its median line. 

 F. Eyes very convergent toward front on 

 almost their entire length, width of in- 

 terocular space in the middle subequal 

 to the length of the head, much narrower 

 toward the front. Color dei.p. Length, 

 13.3 mm.; width 8.3 mm. 



A guttatipennis. 

 FF. Inner edges of eyes subparallel or very 

 feebly convergent toward the back, 

 scarcely converging toward the front, 

 only on the anterior third. Interocular 

 space, even in front, widf^r or subequal 

 to the median length of the head. Color, 

 clear yellowish, flecked with brown. 

 Length, 13.7 mm.; width, 8.8 mm. 

 A. signorefi. 

 Genus AMBRYSUS Stal. 

 Ambrysus pulchellus. Montd. 1897. 



Moiit. Verb. Zool. Bot. Ges. Wien., XXVII, pp. H, 16. 



"At first sight a little similar to A pudicus Stal. as to size and color, 

 but proportionately a little less narrow; less narrowed behind; the small 

 brownish spots a little more marked on the head and the pronotnm, 

 which is not punctate on the margins, and without depressions or wrinkles 

 on the middle of the anterior border of the pronotum. The pronotum 

 very little enlarged behind, the lateral margins almost parallel poste- 

 riorly. With almost no transverse furrow^; very feebly marked on the 

 margins. The posterior part behind the furrow pale, quite smooth, but 

 covered by a few inconspicuous, very tiny black points. The head very 

 notably punctate on each side near the eyes, these much larp-er propor- 

 tionately than in A. pudicus Stal, as wide with the eyes as half the width 

 of the pronotum. Scutellum and elytra of a uniformly deep brown 

 without spots or clear areas except the embolium, which is yellowish on 

 the basal % for its entire width, the apical M brownish. Margin of 

 elytra is very slightly sinuate behind the eml^olium. Commissure of the 

 clavus a little less than half the length of the scutellum. Connexivum 

 yellowish with a slight amber band covering the tips and the bases of 

 the segments. Posterior angles of the segments not prominent. Length, 

 8 mm. ; width, 4.8 mm. Texas." 



Aynhrysus pulchelhis Montd. 1897. 



Var. pullUlvlufi Nov. var. 



"Length, 8 to 9 mm. Differs from the type by the complete absence 

 of blackish snots or clouds. The head and pronotum entirelv yellow, 

 pale, immaculate, smooth, shining, save some very superficial impressed 

 points, rare and little vi-^il-le, near the anterim- pno-le of the pronotum 

 and behind the eyes. The scutellum entirely yellowish, sometimes scarcely 

 a little less clear than the pronctum. Corium of a dirty yellow or slightly 

 brownish, quite strongly narrowing behind the embolium, although with- 

 out apparent sinnositv, and leaving largeh" uncovered the last segments 

 of the connexivum, yellow, without spots or imperceptibly darker at their 

 base. Posterior angles cf the segments not protuberant. 



