THE THY8AN0PTEEA OF CALIFORNIA. 63 



protruding-, not pilose, with lig-ht-yellow outer margin and a light, 

 irregular inner border. OceUl present, g-ranulated. anterior one on 

 apex and posterior ones bordering- inner margins of eyes. Mouth ,cone 

 about as broad as long, reaching nearlj^ to posterior margin of pro- 

 sternum, pointed at tip; ehitinous thickenings between base of mouth- 

 cone and eyes ver}" rudimentary and al)out equally well developed. 

 jSlaxillary palpi two-segmented; basal segment veiy small, second 

 segment long. Labial palpi two-segmented, basal segment shortest. 

 Anteiinpe eight-segmented, about twice as long as head; color brown, 

 except segment 3 and basal parts of segments 4, 5, and (i, which are 

 yellow. Segment 2 with darkened sense area on dorsal surface; 3 to 

 7 have simple sense cones; 7 and 8 have a row of sense hairs. 



Prothorrix about twice as wide as long; it bears ten long spines, 

 two on anterior margin, one on each anterior angle, one near 

 middle of each side, and two at each posterior angle. Sides of ptei'- 

 fJiora.r slightly convex, converging both anteriorly and posteriorly. 

 Fore coxfe apparently immovabl}- set and forming the outer angles 

 of the prothorax; fore femora somewhat enlarged; all tarsi wirh a 

 brown spot at tip and armed with a small tooth. Wingx reaching 

 nearly to tip of eighth segment, both pairs similar; lirst pair light 

 brown, hind pair gra}'; each with a long, simple fringe on both mar- 

 gin.#. tip of fore wing double fringed behind ])y about twelve hairs; 

 with three prominent spines at base and a wavy thickening near ante- 

 rior margin at base; wings without veins. 



Ahdo)iien broadly ovate, segments 1 to 7 inclusive about equal; 

 eighth tapering abruptly to meet the smaller ninth and very narrow 

 tenth; segments with two long and several shorter spines on promi- 

 nent angles, these spines increasing in length toward the tip. Seg- 

 ments 1 to 7 each with two pairs of inwardly curved spines about one- 

 fourth the width of the abdomen from the margin; the posterior pair 

 in each case is the lai-ger. Tip of tube bears six long and several 

 short hairs. Females with scales on last segments of abdomen. 



Desc7'ihed from numerous specimens. 



2Ia1e similar to female, but without scales on al)domen. 



Food plant: Christmas berry {Ileteroineles arJnitlfolia). 



IlahUat: Coast region of California. 



(23) Trichothrips ilex dumosa, new variety- 



The members of this variety are very similar to the species, differ- 

 ing only in minor details. The two insects are about equal in size; 

 the head is somewhat longer in T. ilex dumosa^ the antennte arc brown, 

 with only the base of segment 3 yellow; all tarsi are gray-l)rown to 

 brown. The food plant is the scrub oak, Qucn-us dumosa. 



IlahUat. — Saratoga, Santa Clara County, Cal. 



