86 SEEEICOENIA. 



posteriorly ; narrowed at the base, gently arcuate at the sides anteriorly ; the surface is 

 marked with moderately closely placed oblique (gently curved) punctured striolse ; there 

 is a very slightly impressed median line, but it is only visible in some lights ; the 

 pubescence is very sparse, except in the lateral impression, where it is more conspicuous ; 

 the posterior ridge is short and inconspicuous and does not extend to the margin. 

 The elytra are reticulate-striolate, very slightly asperate at the base ; the subcosta is 

 very little raised, obtuse, and sculptured like the rest of the surface ; each elytron has 

 three pale yellowish-grey spots — the first in the basal impression, the second 'elongate, 

 just before the middle, and the third elongate-elliptical, placed at a little distance from 

 the apex. The prosternal process is very closely and finely punctured and pubescent. 

 The metasternum has a broad stripe of white pubescence at the sides. The meta- 

 thoracic episterna are moderately closely punctured, with some white pubescence on the 

 outer half. The abdomen has a conspicuous elongate white spot on the upper margin 

 of the basal segment ; the surface below is distinctly but not very closely punctured, 

 each puncture having a very short pale hair; there is an inconspicuous spot at the 

 side of each of the three terminal segments. 



55. Agrilus addendus. 



Agrilus addendus, Crotch, Proc. Ac. Phil. 1873, p. 95 l . 



llab. Noeth Ameeica, Texas (Belfrage 1 ). — Mexico, Northern Sonora (Morrison). 



This species resembles A. detractus, but the head is longitudinally impressed in front ; 

 and the dorsal channel on the thorax is scarcely marked, and the carina is not directed 

 inwards. In the examples in the British Museum, received from Crotch, and in 

 those from Sonora, there is an elongate spot just before the middle of the elytra; 

 the author of the species only mentions 1 the spots at the base and near the apex of 

 the elytra. 



56. Agrilus detractus. 



Obscure cupreus, surdus ; capite antice pube pallide grisea vestito : thorace subtiliter punctate-, transversim 

 tenuiter ruguloso, medio leviter canaliculato, lateribus pube pallide flavo-grisea indutis ; elytris subtiliter 

 asperatis, in regione suturali maculis obscuris sordide flavis ornatis. 



Long. 2f-3 lin. 



Hah. Mexico, Chilpancingo in Guerrero (Hoge). 



The head in the male has the front obscure green, dull, the sculpture excessively fine ; 

 in the female it is more coppery, less dull, finely rugose, with a shallow round impression 

 at the upper part. The thorax has the median channel rather narrow, distinct, but not 

 very deep, a little less distinct in the middle ; the posterior ridge is straight, well 

 marked, fine, and shining, directed obliquely inwards. The elytra have the close aspe- 

 rate sculpture somewhat fine and even ; the subcosta is obtuse, but distinct for the 



