Acalyptrata: those muscid flies in which alulae are absent or rudimentary. Acanthus: a spine, spur or prickle. Acaudal -ate: without a tail. Accessory: added, or in addition to. Accessory carinae: in Orthoptera the lateral carinae of the face. Accessory cell: a cell not commonly present in the group; in some orders of 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 10:= 1st 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 containing a sticky secretion. Accessory subcostal vein: the vein given off from the subcosta and branching toward the apex of the wing in Perlidae. Aceous or aceus: suffix; similar to, or of the nature of. Acephalous: without a head. Acerata: arthropods without true antennae Arachnids 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 Platypsyllidae. 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 crystalline cone or lens; see eucone. {Scanner's note: this is no longer a valid usage for the word "ocelli". Currently the term is. See "ocellus" and "ommatidium".} 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 Dolichopodidae. Aculeata: Hymenoptera; the stingers, including bees and wasps. Aculeate: prickly; armed with short, sharp spines; specifically, in Hymenoptera 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, especially when sting-like, as in Hymenoptera; in male Tipulidae 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.