MEDETERUS. 219 



becomes longer, while the subapical and cubital veins are parallel, and 

 the discal transverse vein is very distant from the hind margin of the 

 wing. 



The typical species of this genus frequent dry places, running 

 in the sunshine on walls and trunks of trees, with a peculiar gait, 

 the legs being nearly erect and the fore part of the body elevated, 

 while they move with seemingly equal ease in any direction 

 without turning. The bulky proboscis opens into a very large 

 orifice, so as to admit a prey large in proportion. 



1. diadema, L. s. n. xii. 982. 19 (1767). rostratus, Fb. ; Fin.; 

 Mg. ; Mq. ; Ztt. ^Eneo-cinereus, hypostomate aureo-viridi nitidissimo, 

 ore antc'itnisque iiigris, thorace vittis tribus cupreo-fuscis, alis hyalinis, 

 halteribus albis, pedibus ferrugineis. Long. 1|- ; alar. 4 lin. 



Brassy-cinereous. Hypostoma bright golden-green, sometimes chaly- 

 beous below, naked, with a snow-white transverse suture in the middle. 

 Antennae quite black ; third joint oval. Thorax with three bright 

 coppery -bran: 11 stripes, slightly pubescent beneath. Wings hyaline. Hal- 

 teres white. Legs ferruginous ; femora and tarsi more or less brown. 



Rare. (E.) 



2. jaculus, Fin. dol. 5. 7 (1823); Mg. ; Mq. ; Ztt. ^Eneo- 

 cinereus, hypostomate virescenti-cano, ore nigro exserto, antennis nigris, 

 thorace vittis tribus ameo-fuscis, alis hyalinis, vena transversa discali 

 elongata ad inarginem interiorem subretracto, halteribus albis ; Mas. 

 hypopygio niagno, crasso. Long. !- ; alar. 3 lin. 



Brassy-cinereous. Hypostoma hoary green, broad. Crown bristly. 

 Mouth large, prominent, black. Thorax with three brassy-brown stripes, 

 slightly hairy on each side. Wings hyaline ; cubital and praebrachial 

 \ cius approximating towards the tip ; transverse discal veins rather 

 long, inclining- towards the interior margin ; pobrachial vein inclining 

 beyond the transverse vein to the hind border, which it does not at- 

 tain ; axillary alulae and halteres whitish. Legs cinereous-black, some- 

 times brown or ferruginous, naked, unarmed ; knees ferruginous ; hind 

 femora pubescent on the outer side. Male. Hypopygium large, long, 

 inflected, black, shining, with brown filiform appendages at the tip. 



Not rare. (E.) 



3. truncorum, Mg. zw. iv. 67. 15 (1824); Mq. ; Ztt. Mueo- 

 cinereus, liypostomate ceneo lateribus virescenti-pruinoso inferne viridi 

 aut cyaneo, ore nigro exserto, antenuis nigris, thorace vittis tribus seneo- 

 fuscis, alis hyalinis, vena transversa discali elongata ad marginem in- 

 teriorem subretracta, halteribus albis ; Mas. liypopygio modice crasso. 

 Long. 1^- ; alar. 2-1- lin. 



Brassy-cinereous, rather smaller and darker than the preceding 

 species, which it much resembles. Hypostoma rather narrow, brassy, 

 yellowish, hoary on each side, green or blue below. Crown bristly, 



