ORTALID^E SYSTEMATIC DISTRIBUTION. 53 



1. Dorycera Meig. 



Charact. — Eyes round ; cheeks very broad ; face very much projecting it 

 profile; inferiorly it is very strongly retreating, carinate. 



The hairs on the body have the ordinary length, or a little over 

 the ordinary ; thoracic dorsum bristly on its hind portion only. 



Antennae projecting, either of ordinary breadth and medium 

 length, with the third joint oval; or narrow and elongate, with an 

 elongate third joint. 



The first longitudinal vein bristly at its end only. 



This genus contains gray species, their faces with dark spots, 

 and with well-marked black stripes upon the thorax ; the wings 

 are either without any picture, or it consists of blackish-gray 

 longitudinal lines, which are more confluent towards the apex, and 

 even, in the male of one species, form a large, black spot. 



The genus may be divided into two sections, which it will be 

 necessary, when the number of species grows larger, to separate 

 as genera. 



Sect. 1. (Dorycera, sensu strict.) Antennae narrow and very 

 much prolonged ; the pilosity of the body is of an ordinary 

 length. 



Typical species : graminum Fab. 



Sect. 2. (Percnomatia Lw.) Antennae of ordinary breadth 

 and of medium length ; pilosity of the body longer than usual. 



Typical species : inornata Lw. 



2. Tetanops Fall. 



Charact. — Eyes rounded-ovate ; cheeks broad. Face in the profile very 

 much projecting, more or less retreating inferiorly. 



The hairs upon the whole body extremely short ; the middle of 

 the thoracic dorsum bristly on its hind part only ; the prothoracic 

 bristles are smaller than in all the other genera of Ortalina. 



Antennae short, often strikingly short ; their third joint oval ; 

 somewhat longer than the second. 



The first longitudinal vein is bristly at its end only. 



This genus contains remarkably glabrous species ; there are no 

 thoracic stripes ; the first segment of the ovipositor is compara- 

 tively large; there is no picture on the wings at all, or it consists 

 only in narrow borders along the crossveins, or in more or less 

 faded spots at the end of the longitudinal veins, thus resembling 

 the picture of Ceroxys. 



Typical species : myopina Fall. 



