124 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



12. Frontal crest slightly broken; ocellar basin with rounded 

 walls; median fovea elongate; saw-guides tapering on 

 both edges, somewhat angularly, to an obtuse tip, smooth, 

 margined with very short, scattering hairs; body light 

 yellowish or reddish, with the antennie above black; tips of 



hind tibiae and their tarsi infuscated. Length 7 mm brunneus 



Frontal crest distinct and unbroken; ocellar basin with wide, 

 rounded walls; median fovea circular, with branches ex- 

 tending over bases of antennx; saw-guides tapering, ob- 

 tusely pointed, clothed with short and rather dense hairs; 

 body resinous yellow, thorax and head reddish; antennae, 

 ring about ocelli, and postscutellum black. Length 6 mm. 



dyari 



*A. concolor (Norton). Nematus concolor Norton. Nematus 

 violaceipcnnis Norton. Farmington (E. N.). 

 , °A. comstocki JMarlatt. 



°A. gracilis Marlatt. 



°A. similis Marlatt. Larva feeds on willow. 



°A. cooki Marlatt. 



°A. rufipes Marlatt. 



°A. azaleae Marlatt. Larva feeds on Azalea. 

 A. fulvipes (Norton). Nematus ftilvipes 'Norton. Connecti- 

 cut (E. N.). 



A. luteotergum (Norton). Nematus luteotergum Norton. 

 Larva feeds on alder. Connecticut (E. N.). 



°A. lineatus (Harrington). Nematus lineatus Harrington. 



°A. brunneus (Norton.) Nematus brunneus Norton. 



°A. dyari Marlatt. Larva feeds on poplar. 



Pteronidea Rohwer, 

 Key to Species. 



1. Females ^ 



Males 34 



2. Dorsum of body black with pale markings 3 



Dorsum of body pale with black markings 31 



3. Pectus always black 4 



Pectus usually entirely pale, rarely in part fuscous 20 



4. Stigma narrow, more than three times as long as wide, usu- 



ally straight on lower margin S 



Stigma broad, not much more than twice as long as wide, 



rounded on lower margin 7 



