2 EXPLANATION OF TERMS 



definite location as, e. g., in Lepidoptera, usually a small cell at the end of the 

 subcosta, giving rise directly or indirectly to veins 7 to io: = ist radius 2 

 (Comst.) ; = areole. 



Accessory glands: any glands opening into the ducts of the reproductive 

 system. 



Accessory sac: a glandular structure of the female reproductive system con- 

 taining a sticky secretion. 



Accessory subcostal vein: the vein given off from the subcosta and branch- 

 ing toward the apex of the wing in Perlidar. 



Aceous or aceus: suffix; similar to, or of the nature of. 



Acephalous : without a head. 



Acerata: arthropods without true antennae: Arachnida and Limulus. 



Acetabular caps: Hemiptera; the coxal cavity. 



Acetabuliform: like a shallow saucer with more or less incurved sides. 



Acetabulum: the cavity into which an appendage is articulated; specifically 

 the coxal cavity, — q. v. ; also applied to a cup-like cavity in the sucking 

 mouth of maggots. 



Achreioptera: ordinal term proposed for the coleopterous family Platyp- 

 syllidcr. 



Achromatic: free from color; tissue that does not stain readily. 



Acicular: needle-shaped ; with a long, slender point. 



Aciculate:a surface that appears as if scratched with a needle. 



Acidotheca: the pupal sheath of the ovipositor. 



Acini: granulations, like those on a blackberry: the terminal secreting tubes 

 of glands. 



Acinose -ous: a surface set with acini. 



Acone: applied to compound eyes in which the individual ocelli have no crys- 

 talline cone or lens ; see eucone. 



Acoustic nerve: connects the auditory pits or other organs of hearing with 

 special ganglia. 



Acridophagus: preying and feeding on grasshoppers. 



Acrostichal bristles: Diptera; two rows of bristles on the middle of the 

 dorsum ; specifically, minute peculiar bristles on the dorso-central region of 

 Dolichopodidce. 



Aculeata: Hymenoptera; the stingers, including bees and wasps. 



Aculeate: prickly; armed with short, sharp spines; specifically, in Hymen- 

 optera furnished with a sting which is a modified ovipositor and connected 

 with a poison sac. 



Aculeus -ei: a prickle; a small sharp point; specifically, an ovipositor, espe- 

 cially when sting-like, as in Hymenoptera ; in male Tipulida a slender, horny, 

 often curved and pointed piece, projected when the forceps is open. 



Acuminate: tapering to a long point. 



Acupunctate: a surface with fine punctures as if made with a needle. 



Acutangulate: forming, or meeting in an acute angle. 



Acute: pointed; terminating in or forming less than a right angle. 



Acutilingual: with a sharp pointed tongue or mouth structure, as in some bees. 



Acutilingues : bees with a short pointed tongue: see obtusilingues. 



