52 MISCELLANEOUS PAPERS, 



Heliothrips hsemorrltoidalis is one of the commonest thrips in 

 greenhouses, where it feeds on azaleas, ferns, and dahlias; out of doors 

 it feeds and becomes very destructive on laurestinas. 



Hel'iotliriiys. fasciatus (PI. II, fig's. 12-14) has been taken from oranges 

 in Colusa County by Mr. E. K. Carnes, from pea vines in Santa Rosa 

 by Mr. O. E. Bremner, and the writer has taken it from wild vetch 

 sweepings in the Santa Cruz Mountains, Santa Clara County, Cal. 



5. Genus EUTHRIPS Targione-Tozzetti. 



Ocelli usual!}' present, but sometimes more or less rudimentary. 

 Antennae eight-segmented. Maxillary palpi three-segmented. Pro- 

 thorax as long or somewhat longer than head, with two long spines on 

 each hind angle and one similar spine on each anterior angle in man}^ 

 species, but this is wanting in others. Legs usually unarmed, but in 

 a few species with a stout tooth on the under side of fore tibia at end. 

 Wings usuall}^ f"lly developed, but sometimes reduced; when present 

 they are moderately broad, and in those species which have a spine at 

 the fore angle of the pronotum both longitudinal veins are closely 

 and regularl}^ set with spines for their entire length. Spines on the 

 abdomen are moderately stout, anal spines are long and slender. 

 These species are usually active and most of them have the power of 

 springing. 



(9) Euthrips orchidii, new species. (PI. 11, tigs. 15-18.) 



Measiirements: Head, length o.lo nun., width 0.15 mm.; prothorax, 

 length 0.10 mm., width 0.18 nmi. ; mesothorax, width 0.22 mm. ; abdo- 

 men, width 0.25 mm.; total body, length 0.88 mm. Antenna3: 1, ISyu; 

 2, 30/^; 3, 48yu; 4, 48yu; 5, 48yw; 6, 54//; 7, 12>m; 8, 21yw; total, 0.28 mm. 

 Color 3'ellow, head and all legs light lemon-yellow, wings light brown. 

 Head one-third wider than long, retracted into prothorax, angular 

 in front, with concave depressions receiving basal joints of antennae; 

 spines inconspicuous: cheeks almost straight; head broadest across^ 

 eyes. Eyes relatively large, occupjdng aV)out one-half the length 

 of the head, prominent; pigment granular and from deep red to 

 purple; facets of eye as large as ocelli, eyes pilose. OeeUi subap- 

 proximate, margined inwardly with orange-red crescents. Mouth-cone 

 short, reaching hardly beyond posterior margin of head, pointed and 

 with a brown spot at tip; maxillary palpi three-segmented. Antennix, 

 eight-segmented, light lemon-yellow, wnth tips of segments 4, 5, and 

 6 shading to light brown; segments 3, 4, and 5 of about the same 

 length, segment 6 longest; forked sense cones on segments 3 and 4 

 long and slender, a short and a long simple sense cone near tip of 

 segment 5, a similar pair on 6; on this latter segment the inner long- 

 cone is very long and reaches almost to tip of antenna?. All spines 

 and sense cones are pale and inconspicuous. 



