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



Head : labium and antennae black ; labrum, clypeus, front ver- 

 tex, occiput and postgenae green; rear of head with prominent 

 tubercle on each side. 



Thorax : green, black below ; legs black ; wings narrow, their 

 apices infuscated for 5 mm. to 6 mm. from the tip or less. 



Abdomen: uniform metallic green; anal appendages black, 

 similar to those of maculatum. 



Female. — Stigma white, provided with 2-5 cells; the wings 

 usually without dark tips ; a prominent ridge and blunt spine on 

 dorsum of segment 10. 



Measurements : total length, male 43-45, female 37-41 mm. ; 

 length of abdomen, male 34, female 30-33 mm.; length of hind 

 wings, male 26-27, female 27 mm. ; width of hind wings, male 7, 

 female 7-7.5 mm. 



A male specimen in the Yale University collection taken at "So. 

 Reading" belongs here. 



New England. — June 21-July 21. 



Agrion maculatum Beauvois 



Insectes recueillis en Afrique et en Amerique, etc., 85 : plate 7, f , 3 : 1805. 



Nymph. — Color dark brown. 



Head : pentagonal, a little contracted behind the eyes ; eyes 

 black, a black stripe nearly the width of the eye extending to the 

 caudal margin of the head, and another stripe extending from the 

 antennal fossae to the eyes ; proximal segment of the antennae 

 thick, about as long as the head, and usually longer than all the 

 remaining segments together; labium (Fig. 7, No. 10) with 

 deeply cleft median lobe, the cleft extending proximad of the 

 articulations of the palpi ; proximal segment of the palpus with 

 3 immovable end-hooks and 2 small setae near the base of the 

 distal segment. 



Thorax: prothorax with a broad dark line on each lateral 

 margin which is continuous with the dark line on the side of the 

 head ; legs with whitish femoral bands on the apical third of each, 

 beyond which the femur is brown ; also a brown band proximad 

 of the white one. 



Abdomen : subcylindrical, dark, and without prominent lateral 

 keels ; apical margins of the terga with about four dark spots on 

 the dorsum; lateral tracheal gills three-sided, somewhat blunt, 

 with a white transverse band near the middle; median gill flat, 

 shorter, with a similar white band at the middle and another faint 

 one beyond; marginal setae of the gill long and slender and 

 extending entirely around it. 



Measurements: length, 20 mm.; length of abdomen, 15 mm.; 

 length of lateral gills, 10-12 mm. ; length of metathoracic wing- 

 cases, 6 mm. ; length of median lobe, 4.5 mm. ; width of median 

 lobe, 1.3-3 mm. 



