SUBGENUS TRICHAPION — KISSINGER 281 



Marquette (MCZ). Iowa: Iowa City, L. L. Buchanan (USNM); Lake Okoboji, 

 Jul}' 22, 1916, L. L. Buchanan (USNM). South Dakota: Custer, Aug. 28, 1935, 

 M. W. Sanderson (UK). Washington: Deeplake, May 5, 1949, G. H. Nelson 

 (DGK). California: Siskiyou Co. (TLCC). Utah: Cedar City, Aug. 13, 1929, 

 P. W. Oman (UK); Emery, Aug. 16, 1929, P. W. Oman (UK). Colorado (MCZ, 

 USNM). 



Remarks: This is the first time an Apion species is recorded as 

 being holarctic in distribution, I am indebted to Dr. W. J. Brown 

 for informing me (personal communication) about the new record of 

 a European species of Ajpion being found in Newfoundland by Dr. 

 Palmen. 



Apion proclive Group 



The six species grouped here agree in general characters as mentioned 

 above. In addition the beak of the male in doi-sal view is attenuate 

 distad of the antennal insertion, generally to the apical third, and there 

 is marked sexual dimorphism in the structure of the beak; in the 

 female this part is slender, elongate, and more strongl}^ attenuate. 

 The ranges of the Mexican species are incompletely known due to lack 

 of collections. The ranges of A. coryi, new species, and A. proclive 

 LeConte probably do not overlap. 



A comparison shows that the males of two species, A. proclive and 

 A. coryi, have dentate mucrones, while the mucrones of the males of 

 the remaining species are nearl}^ simple. The former two species arc 

 apparently closely allied. The male of A. coryi has all three pairs of 

 tibiae mucronate while A. proclive has only two pairs of tibiae mucron- 

 ate. However under the discussion of A. proclive an interesting series 

 from Arizona is noted which is apparently'- identical to A. proclive but 

 the front tibiae of the male are minutely mucronate. The main 

 differences between the two species are as follows: A. coryi has the 

 elytra comparatively short and more robust, being only 2.5 times as 

 long as the pro thorax, the elytral intervals are more convex, the 

 prothorax is more coarsely and closely punctured, the basal fovea of 

 the prothorax extends one-third its length, the beak of the male is as 

 long as the head and prothorax combined, more noticeably deflexed at 

 the apical fourth, the beak of the female is more strongly deflexed at 

 the apical third, and the eyes are more prominent. The elytra of A. 

 proclive are comparatively longer, being 2.8 times as long as the pro- 

 thorax, the elytral intervals are flatter, the basal fovea of the pro- 

 thorax short, the beak of the male is shorter than the head and pro- 

 thorax combined, the beak of both sexes is evenly curved, the eyes are 

 not prominent, and the species is generally larger in size. 



Of the other species, A. acanonicum, new species, is immediately 

 distinct because of the unusual male characters, Apion imitator 



