300 connecticut geol. and nat. hist. survey [bull. 



Glossary 

 A: Anal vein. 

 Accessory appendages: Genital appendages on the venter of the 



second abdominal segment. 

 Accessory genitalia: Genital appendages on the venter of the second 



abdominal segment. 

 Acuminate: Tapering to a long point. 



Anal appendages: Movable appendages at the tip of the abdomen. 

 Anal loop: The area including a few to many cells, between the 



branches of the anal vein, or between cubitus and the first 



anal vein. 

 Anal membrane: A semiopaque membrane in the hind wing of some 



Odonata beginning at the articulation of the wing and 



extending along the hind margin; also called membranule. 

 Anal vein, -s: The sixth to the ninth longitudinal vein located behind 



the cubitus and commonly short or abbreviated in Odonata. 

 Anepistemum: The dorsal division of the episternum (supraepi- 



sternum); mesanepisternum: anepisternum of mesothorax; 



metanepisternum: anepisternum of metathorax. 

 Annulate: Ringed or marked with colored bands. 

 Annuli: Rings. 



Anteclypeus: The lower of two divisions of the clypeus. 

 Antenna, -ae: Segmented sensory appendages borne one on each side 



of the head; "feelers." 

 Antenodal cross-veins: Cross-veins between C and R, proximad of 



the nodus. 

 Anterior lamina: Anterior plate of the accessory genitalia of male 



Aeshnae. 

 Approximate: Near or close together. 

 Arculus: In Odonata a cross-vein between radius and cubitus from 



which the median vein apparently arises. 

 Auricles: Ear-like protuberances on the second abdominal segment. 



Basal lobes: Small plates at the base of the ovipositor. 



Basilar space: A cell at the base of the wing bounded by radius, 



cubitus, arculus, and the base of the wing; also median space. 

 Bifid: Divided into two parts; split. 



Bifurcate: Divided not over half its length into two parts; forked. 

 Bisinuate: With two sinuations or curves. 

 Boreal: Belonging to the faunal region extending from the polar sea 



southward to near the northern boundary of the United 



States, and further south in the Rockies. 

 Bridge: Wing vein connecting radial sector with media. 



C: Costa. 



Carina: Ridge. 



Carinate: Ridged. 



Caudad: Towards the rear. 



Cephalad: Towards the head. 



Cephalo-mesal: Towards the head and at the same time towards the 

 meson. 



Cercus, -i: Lateral cylindrical appendages at the tip of the abdomen. 



Chitin: Substance forming the external skeleton of insects. 



Chlorinated: Transparent yellow. 



Claws: Hooks at the tips of the legs; commonly tarsal claws. 



Clypeus: A head sclerite below the front and above the labrum. 



Compound eyes: Large eyes on the lateral surface of the head, com- 

 posed of many smaller divisions. 



Confluent: Running together; said of two spots that coalesce. 



