26 GENUS CLADIUS. 



Synopsis of Species. 



Males. 



1 (2) Antennae with four long branches. Pectinicornis. 



2 (8) Antennae with a knob at the base of third joint. 



3 (4) Abdomen luteous. Viminalis. 



4 (5) Abdomen black. 



5 (6) Legs reddish -yellow. Rufipes. 



6 (7) Legs white. ' Drewseni. 



7 (6) Knees, tibiae and tarsi white. Eradiatus. 



8 (2) Antennae simple, compressed. 



9 (10) Legs for the greater part white, wings hyaline. Padi. 

 10 (9) Only the knees, tibiae and tarsi white, wings smoky at the base. 



Females. 



1 (2) Abdomen luteous. Viminalis. 



2 (1) Abdomen black. 



3 (4) Legs reddish-yellow. Rufipes. 



4 (3) Legs more or less white. 



5 (8) Legs white at the base. 



6 (7) Third joint of antennae curved, spurs not one-third of length 



of metatarsus. Drewseni. 



7 (6) Third joint of antennae straight, spurs reaching to near middle 



of metatarsus. Padi. 



8 (5) Legs black at base, knees, tibise and tarsi white. 



9 (10) Wings smoky at base; third joint of antennae straight. 



Brulltei. 



10 (9) Wings uniformly hyaline ; third joint curved. 



11 (12) Third, fourth, and fifth joints of the antennae obliquely trun- 



cated and produced into a sharp point at the apices ; tibiae 

 and tarsi yellowish-white. Pectinicornis. 



12 (11) Apices of the antennal joints not obliquely truncated, tibiae 



and tarsi white, more or less fuscous. Eradiatus. 



SECTION I. 



In the (^ on the underside of the third joint at the base is a 

 small knob-like projection ; at its apex on the upper side is a 

 branch-like prolongation nearly as long as the segment itself; 

 on the fourth, fifth, and sixth are similar processes, each 

 gradually decreasing in length ; the seventh is a little pointed 

 upwards at the apex, the last joint is almost awl-shaped. In 

 the $ the joints become gradually shorter and thinner ; the 

 third is bent beneath, and the fourth sixth have their 

 apices obliquely truncated and the upper edges produced into 

 sharp spine-like projections. In the $ the joints are densely, 

 in the $ only slightly, pilose. Cerci long ; calcaria a little 

 shorter than them. Head densely covered with a fuscous pile 

 = Cladius. 



