DESCRIPTION OF THE SPECIES. 243 



Observation. Trypeta longipennis has no immediate relatives 

 among the European Trypetidse. From Spilographa abrolmii- 

 Meig., and macrochseta Lw., which resemble it somewhat in the 

 peculiar shape of the frontal bristles, it differs too much, in the 

 stature of the body, the shape of the head, as well as in the outline, 

 the venation, and the picture of the wings, to be placed in the 

 same genus Spilographa. It must be considered, therefore, as 

 the type of a separate genus. Mr. R. Desvoidy has given it the 

 name of Strauzia, which may be preserved, after being modified 

 into the more correct form of Straussia. The principal charac- 

 ters of the genus Straussia are the following : 



Body long and narrow; head remarkably swollen, especially 

 the occiput; eyes rounded and rather small for a Trypeta, so that 

 in the profile the front advances much before the eyes and the 

 cheeks are very broad. Lateral border of the front raised in 

 the shape of a cushion, so that the whole front assumes the 

 appearance of a basin. Antennae short, reaching, perhaps, as far . 

 as the middle of the face; the last joint rounded at the tip 

 Face retreating inferiorly ; oral opening small, without any sharp 

 anterior edge ; the rather broad palpi not reaching beyond this 

 edge. Scutellum convex, with four bristles. Abdomen elongated 

 and considerably narrower than the thorax. Ovipositor of the 

 female not flattened. Wings comparatively long and only mode- 

 rately broad, in the male narrower than in the female, especially 

 towards their end; the picture consists of rivulets; first and third 

 longitudinal veins distinctly bristly ; the third and fourth veins 

 towards their end somewhat divergent and rather strongly bent 

 backwards ; small crossvein placed about the beginning of the 

 last third of the discal cell; the posterior angle of the anal cell is 

 drawn out in a sharp point. 



12. T. electa SAY. 9. (Tab. X, f. 7.) Lutea, vittis thoracis et scu- 

 tello ex-albidis, angulis lateralibus hujus nigris ; tibiae posticae setis 

 nigris, proportions longis ciliatae ; alae hyalinae, fasciis duabus integris 

 adversus marginem posticum convergentibus,strigula interjecta a costa 

 ad venam longitudinalem tertiam ducta, et costae ipsius limbo inde a 

 fascia secunda usque ad apicem cellulae posterioris secundae pertinente, 

 fuscis. 



Clay-yellow, longitudinal stripes of the thorax and scutellum whitish; 

 the latter with blackish lateral corners ; posterior tibiae ciliated with 

 comparatively long black bristles ; wings hyaline, with two complete 



