USED IN ENTOMOLOGY. 121 



Scutellar space: in Mantids, an area between antennae and clypeus. 



Scutellate: dish- or platter-shaped. 



Scutellum: the third dorsal sclerite of the meso- and metathorax: in Colc- 

 optera, the triangular piece between the elytra at base and universally re- 

 ferred to as the scutellum : in Hetcroptcra, a similar sclerite between base 

 of hemelytra : in Diptcra, a subhemispherical body posteriorly cut off by 

 an impressed line from the dorsum of the mesothorax. 



Scutes: the chitinous shields or plates on the segments of larvae. 



Scutiform: = scutate; q. v. 



Scutum: the second dorsal sclerite of the meso- and metathorax. 



Seal-brown: a brilliant deep red-brown; almost like, but darker than, cas- 

 taneous [between dragon's blood and Indian red]. 



Sebaceous: fatty or oily; applied to glands secreting such substances. 



Sebific: oily; sebaceous; somewhat sticky. 



Sebific duct: carries the excretions of the colleterial gland to the bursa 

 copulatrix. 



Second antennal segment: the third or tritocerebral segment of head. 



Secondaries: the hind wings; always attached to the metathorax. 



Secondary sexual characters: features possessed by one sex but not the 

 other, other than the differences of the reproductive organs themselves ; 

 e. g., color, size, shape, etc. 



Second clypeus: see anteclypeus. 



Second costal cell: in Hymenoptera (Pack.), is the stigma. 



Second inner apical: in Hymenoptera (Nort.), = media 3 (Comst.), to the 

 junction of medial cross-vein; also called submarginal nervure in part. 



Second lateral thoracic suture: in Odonata, extends from base of second- 

 aries to the rear of the third coxa. 



Second longitudinal vein: in Diptcra (Will.), = radius 2 + 3 (Comst.). 



Second maxilla: the labium; q. v. 



Second maxillary segment: the seventh or labial segment of head. 



Second median area: see median area; areola. 



Second submarginal nervure: Hymenoptera (Nort.), = radius 5 (Comst.). 



Secretion: any matter produced by a gland: in Coccida, specifically, the 

 waxy, fibrous, cottony or silky substances forming the " scales." 



Secretionary supplement: that part of a Diaspid scale extending beyond or 

 around the pellicles. 



Secretory: concerned in the process of secretion. 



Sectores coronis: the tearing or cutting structures used by the Lcpidoptcra 

 in working out of a cocoon. 



Sectors: longitudinal veins in Odonata, which strike the principal veins at 

 an angle, and usually reach the apex or hind margin : they are radial, sub- 

 nodal, principal, nodal, median, short, and upper and lower of triangle : 

 all of which see. 



Secund: pointing one way: unilateral. 



Securiform: triangular-compressed; like the blade of a hatchet. 



Sedentary: not active: settled or remaining in one place. 



Segment: a ring or division bounded by incisions or sutures: a segment of 



