No. 39] ODONATA OF CONNECTICUT: GLOSSARY 303 



Metepimera: Epimera of the metathorax. 



Microthorax: A minute division at the cephalic end of the thorax. 



Nodus: A slight indentation in the front margin of the Odonate 



wing, supported by a heavy cross-vein. 

 Notum: The dorsal or upper part of a segment, usually applied to 



the thorax. 



Occipital foramen: The opening through vidiich the vital organs pass 



from the thorax to the head. 

 Occipital horn: Chitinous horns just below^ the occipital ridge on 



each side of the head. 

 Occipital ridge: A ridge extending betw^een the compound eyes on 



the caudo-dorsal angle of the head. 

 Occipital spine: Spine on the caudo-dorsal surface of the head 



between the compound eyes. 

 Occiput: Region of the head between the compound eyes and behind 



the transverse suture in Anisoptera. 

 Ocellar ridge: A ridge just behind the ocelli. 

 Ocellar stripe: A pale stripe on the dorsum of the head behind the 



ocelli. 

 Ocellus, -i: Simple eyes, of which there are three on the dorsum of 



the head of adult Odonata. 

 Ochraceous: Yellow with a slight tinge of brown. 

 Ovate: Egg-shaped. 

 Ovipositor: The tubular or valve-like structure by which the eggs 



are placed. 



Palpus, -i: Jointed appendages attached to labium. 



Paraptera: Small plates at the bases of the front wings. 



Pile: Very fine hair-like setae; velvety in appearance. 



Pilose: With pile. 



Pleura: The lateral sclerites between the dorsum and sternum of a 



segment. 

 Pollinose: Covered with a pollen-like dust. 



Postclypeus: In Odonata the proximal division of the clypeus. 

 Postcoxal areas: Areas on the venter of the thorax behind the meta- 



coxae. 

 Posterior: Hind or hindmost; opposed to anterior. 

 Postgenae: Sclerites on the rear of the head on either side of the 



occipital foramen. 

 Postnodal cross-veins: Cross-veins between C and R and between 



nodus and stigma. 

 Postocular spots: Pale spots on the dorsum of the head in Zygoptera 



beliiiid and usually laterad of the ocelli. 

 Precoxal: Before or in front of the coxae. 

 Preocellar band: A dark pigment stripe immediately in front of the 



ocelli. 

 Prescutum: Front division of the scutum. 

 Proepimerum: Caudal plate in the pleura of the prothorax. 

 Proepisternum: Cephalic plates in the pleura of the prothorax. 

 Pronotum: Dorsal shield of the prothorax. 

 Propleura: Pleura of the prothorax. 



Prothorax: That division of the thorax bearing the first pair of legs. 

 Proximad: Extending towards the body. 

 Proximal: Situated near the body; opposite of distal. 

 Pruinose: Hoary: as if covered with a fine frost or dust. 

 Pterostigma: A dark opaque spot on the front margin of the wing 



near its tip; same as stigma. 

 Punctae: Small spots on the dorsum of Aeshna nymphs. 



