REVISION OP STREPSIPTERA PIEECE. 201 



Taeniaeform. — Ribbon-like, referring to male antennal flabellations. 



Tarsal appendages. — See Appendiculate tarsi. 



Temporary host. — Any insect which may become the agency of transfer of the tri- 

 ungulinid; the function of the temporary host commences at the flower or other 

 point of transfer and ceases when the triungulinid is passed on to another host 

 (temporary or permanent), or to another flower. 



Tenth abdominal segment. — That flap-like segment of the abdomen overhanging the 

 tip of the cedeagus and the cavity of the ninth segment; it is usually much sur- 

 passed ventrally by the ninth segment. Apically it bears the anus. 



Tessellated. — Applied by Templeton to the hexagonal checker-board appearance of 

 the antennae. 



Tessera. — The hexagonal areas of the antennae (of Templeton). 



Third larva. — The sixth and last larval instar of hypermetamorphic insects of the 

 meloid type; characterized by its activity from the coarctate larva. 



Thoracic ganglion. — The nervous mass located in the thorax. 



Transfer. — The act or acts involved in transplanting the triungulinid from its maternal 

 host to its permanent host. 



Transfer plants. — Plants which are the passive agencies in the transfer of the triun- 

 gulinids from host to host. 



Triungulin. — Hexapod larvae of the hypermetamorphic beetles, having three clawed 

 tarsi (Meloidae). 



Triungulinid (proposed by Doctor Chobaut instead of "triunguloid," 1906). — Hexapod 

 larvae of hypermetamorphic insects with or without tarsal claws, having also 

 sucker-like pulvilli tipping the tarsi (Rhipiphoridae; Strepsiptera). 



Triunguloid (proposed by the writer in 1904). — See Triungulinid. 



Trophapothetic. — Refers to insects which store food for their young. 



U. 



Ultimate stage of second larva. — The fourth instar of hypermetamorphic insects of the 

 meloid type. 



V. 



Ventral ganglion. — The nervous mass located in the abdomen. 



Ventral slit. — A slit-like opening on the venter of the cephalothorax at the base of 



the head; the exit of the brood canal. 

 Vestigial. — Used in contrast to rudimentary; referring to organs which have lost all 



function, as the vestigial mouthparts of the female. 



