114 The University Science Bulletin. 



of the National Museum, including the type of Baker's inornatus. 

 Through the kindness of Dr. J. Chester Bradley, the material at 

 Cornell University was studied, and Prof. C. P. Gillette kindly per- 

 mitted the examination of the collection of the Colorado Agricul- 

 tural College. 



DISTRIBUTION. 



As far as our present knowledge goes, the members of this genus 

 have hitherto been taken only in the United States and Mexico, a 

 single specimen at least having been collected as far south as Yuca- 

 tan. In our country it is for the most part southern and western in 

 its distribution. This, along with its occurrence in Mexico, would 

 indicate its probable presence throughout Central America and per- 

 haps in the northern portion of South America. For this last state- 

 ment, however, there is no certain data. The genus is, therefore, 

 both Nearctic and Neotropical. 



The following states have yielded specimens of this genus: New 

 Jersey, Maryland, District of Columbia, North Carolina, South 

 Carolina, Virginia, West Virginia, Florida, Alabama, Mississippi, 

 Tennessee, Arkansas, Missouri, Kansas, Oklahoma, Colorado, Utah, 

 Washington, California, Arizona, Texas and Georgia. 



HOST PLANTS. 



Very little information is available as to the specific plants on 

 which the members of this genus feed. Most of the specimens 

 collected were taken while sweeping grasses or weeds. De Long 

 reports Acinopterus acuminatus as abundant on grasses in Tennes- 

 see. Ainslie took specimens from blue grass. Doctor Ball believes 

 that A viridis var. variegatus feeds on wild geranium. A single 

 specimen of A. angulatus was swept from Sphoeralcea angustifolia. 

 A label on a specimen of A. acuminatus from Oklahoma states that 

 it was taken from Amphiachyris, while another specimen from 

 Rosser, Tex., was taken from Tetraneuris. Evidently most of the 

 members of the genus are either grass feeders or else have as their 

 hosts various weeds found in grassland. Much more careful collect- 

 ing will need to be done before we can be certain of the specific 



hosts. 



DESCRIPTION OF THE GENUS. 



The following is Van Duzee's description of the genus: 



General appearance of Allygus, but with the elytra strongly narrowed 

 posteriorly, and the tip acute. 



Head narrower than the pronotum, rounded, or somewhat produced before, 



