AGKILUS. 59 



almost equally out of place in any part of the series ; in these cases I have inse rted 



them where they seem to cause least interruption : — 



Species. 

 I. Abdomen with the first and second segments united into one ^~^J *T 



A. Thorax with very uneven surface ; the elytra more or less variegated 



with grey pubescence 1-6 



B. Thorax with a posterior ridge \ 



* Elytra with some distinctive character at the apex (dilated, 



diverging, or spined) 2 . 



§ Elytra arched downwards at the apex . 7-9 



§§ Elytra horizontal. 



f Thorax sulcate 10-23 



ft Thorax not sulcate 3 ; generally with two impressions, one 



in front of the other 24-45 



** Elytra with the apex simply denticulate or serrate 4s6-4$ ?£ 



*** A. furcillatus and A. sulcatus «#0»91 ?f~fL. 



**** A. eupalamus W ft 



***** ^. Catherines, A. splendidipodex, and A. aureus 98=^95 



C. Thorax without posterior ridge. 



* Apex of each elytron emarginate 9C tf 



** Apex of the elytra simple 9fH#7 f f ' 



*■** Thorax more or less coppery; elytra uniformly granular, with 



grey pubescence ; the antennse sometimes very broad . . . lOS^HT 



**** A. blandulus and A. signatus l lft'lHO ' O -fty 



***** A. albofasciatus -H4 ffS~ 



****** Abdomen in the male with a longitudinal impression on basal 



segment <Hf5~ : f i 8fr /'& * 



D. Thorax with the posterior ridge replaced by an oval swelling 4 . 



* Upper surface smooth and shining, at most with only a slight longi- 



tudinal thoracic impression. 



§ Apex of the elytra expanded 1^1 



§§ Apex of the elytra simple -122-12? 



** Upper surface less smooth ; thorax with a deep fovea or channel . 128-134* /lf-/JX* 



II. Abdomen with the first and second segments distinct -435-Mi"" 



l. Agrilus insequalis. (Tab. IV. figg. 10, 10 a.) 



Obscure Eeneus, nitidus ; capite excavato, binodoso ; thorace subquadrato, vermiculoso, disco longitudinaliter 

 profunde canaliculato, lateribus oblique inclinatis, basi foveolatis ; elytris cyanescentibus, unicostatis, 



1 Except A. ignotus, which has a swelling. 



2 Except A. cavatus and A. funestus. 



3 Except A. apicalis. 



4 Except A incertus, which has a ridge. 



12 



