PROC. ENT. SOC. WASH., VOL. 20, NO. 1, JAN., 1918 5 



Represented in our Laboratory collection by one male speci- 

 men from Algonquin, 111. (Nason), and another from Dongola, 

 111., May 11, 1916 (Hart). 



Genus Ghaetoclusia Coquillett. 



There are two American species of this genus, neither of which 

 I have before me at present. The first vein of the wings is 

 bristly on the apical portion in this genus. 



The species may be separated as follows: 



Thorax entirely yellow; anterior tibiae and tarsi brown, mid and hind 

 legs yellow; wings yellowish hyaline (New Jersey). . . .affinis Johnson 



Thorax with a black stripe on each side of mesonotum and otherwise 

 marked with black; fore legs yellow, basal half of mid and hind 

 tibiae usual brownish; wings with apices and cross veins more or 

 less clouded with brown (Nicaragua) bakeri Coquillett 



Genus Clusiodes Coquillett. 



There are five North American species of this genus, which 

 may be separated by means of the following key. 



Key to Species. 



1. Thorax largely yellowish on disc; legs entirely yellow; face of male 



black melanostoma 



Thorax largely black on disc, always so in front; legs not entirely 



yellow except in flavipes 2 



2. Wing with 2 dark marks, a narrow one below apex of first vein, and 



another, much larger, at apex; legs entirely pale yellow. . .flavipes 

 Wing with one dark cloud covering the apex of wing and sometimes 

 continued along costal margin; legs partly black or brown 3 



3. Infuscation of wings extending from apex of first vein round tip 



of wing geornyzina 



Infuscation of wings confined to apical third, falling far short of 

 apex of first vein 4 



4. Fore tarsi entirely yellow apicalis 



Fore tarsi in part black 5 



5. All fore tarsal joints of female and the apical 3 or 4 in male black 



pictipes 



Basal or basal and second fore tarsal joints black, the others con- 

 spicuously white albimana 



Clusiodes melanostoma Loew. 

 Heteroneura melanostoma Loew, Berl. Ent. Zeitschr., 1804, p. 98. 



Originally described from specimens obtained in New York 

 State, and subsequently recorded by Johnson from the following 



