lyS HOMOPTERA 



and we are therefore considering Glischioceiitrns as belonging to the Acuminatini and quoting Fowler's 

 description and copying his figure for our characterizations. The original description is as foUows : 



« Very close to Phaulocenirus (*), but distinguished by having the forehead more even, the 

 frontal tubercles very small, the eyes less prominent, and the pronotum without the ordinary 

 central carina, and obtusely produced above the metopidium; the tegmina, moreover, have only 

 two discoidal areas; the latter character, however, is somewhat difficult to distinguish in these 

 genera. » 



Type cucullatus Fowler. 



Geographical distribution : The genus is known only from the type species from Chiriqui. 

 I. cucullalus Fowler, B. C. A. II : i6i. i. (1896). — PI. 9, flg. I 38. Panama. 



161. GENUS MICROCENTRUS STAL 



Microcentrus Stal, Bid. Memb. Kan. 295 (1869). 

 Phaulocentrus Fowler, B. C. A. II : 159(1896). 



Characters : A genus of large, robust, heavy-bodied insects with a short posterior process lying 

 close to the scutellum and with long, semiopaque tegmina showing five apical and three discoidal cells. 

 Head subquadrate, twice as wide as high, greatly deflexed; base weakly arcuate with a pair of strong 

 tubercles, one on each side of the median line ; eyes ovate; ocelli prominent, about equidistant from each 

 other and from the eyes and situated on a line drawn through centers of eyes ; inferior margins of genae 

 strongly sinuate; clypeus broad and fiat and extending for half its length below the inferior margins of 

 the genae. Pronotum roundly convex, sometimes with more or less well developed suprahumeral protu- 

 berances; metopidium nearly vertical, broader than high ; median carina strongly percurrent; humeral 

 angles heavy, triangular, blunt; posterior process very short, slender, sinuate, hollowed out on each side 

 at the base, closely impinging on the scutellum ; scutellum well exposed, triangular, base swollen, tip 

 deeply notched in the center. Tegmina long, semiopaque; base narrowly coriaceous; veins strong and 

 more or less punctate; five apical and three discoidal cells; tip acute ; no apical limbus. Femora cylin- 

 drical; tibise sometimes weakly dilated ; hind tarsi longest. 



Type carytB Fitch. 



Geographical distribution : This is primarily a North American genus. In the United 

 States and Canada the individuals of the tvvo commonest species are very abundant. The other represent- 

 atives of the genus range as far southward as Central America but south of the United States the insects 

 seem to be rare. 



1. auirtiis Ball, Proc. Biol. Soc. Wash. 46. 3o (igSS). Arizona. 



2. carya Fitch, Cat. Ins. N. Y. 52 (i85i). Pl. 9, flg. 139. Eastern Canada, eastern and 



central U. S. 



3. cornutus Fowler, B. C. A. II : 160. 4 (1896). Mexico. 



4. lynx Ball, Proc. Biol. Soc. Wash. 46. 29 (1^33). Colorado. 



5. nicholi Ball, Proc. Biol. Soc. Wash. 46. 3o (tgSS). Arizona. 



6. perdita Amyot and Serville, Hemip. 377 (1843). Eastern, central, southern and 



capra Goding, Can. Ent. XXV : 172 (1893). western U. S. 



leibecki Goding, Can. Ent. XXV : 172 (189.3I. 



(*) Now M icrocentrus . W. D. F. 



