236 



PS 7 CHE. 



[March 1S92. 



I11 the workers of Termes Jiavipes 

 the oenocytes are much more difficult to 

 detect. They are flattened cells im- 

 bedded in the pleural hypodermis near 

 the stigmata. It is their size which 

 mainly distinguishes them from the hy- 

 podermal cells ; the latter measuring 

 only S k- while the former measure 37 n. 



Thysanoptera. Oenocytes occur in 

 compact metameric clusters in a species 

 of Phloeothrips very common on the 

 blossoms of Chrysanthemum le?ican- 

 ihemum during July and August. 



These clusters occur in at least six of the 

 abdominal segments, possibly in eight, 

 but as they diminish in size very rapidly 

 from before backwards, I am not sure 

 that I have found them in the 7th and 

 8th metameres. The clusters lie in the 

 pleural region well out in the body cav- 

 ity and each consists of some 8 or 10 

 cells which from mutual pressure are 

 often very irregular. The cells measure 

 18.5-26 (a in diameter — their nuclei 

 3-6 (a. They are perfectly distinct 

 from the fat-body and blood corpuscles. 



A NEW GENUS AND SPECIES OF TABANIDAE. 



BY J. M. AI.DRICH, BROOKINGS, SOUTH DAKOTA. 



The general appearance of the fly is 

 that of a particularly fine large silvery 

 Hippoboscid, with brown wings. Nev- 

 ertheless, an examination shows it to be 

 truly Tabanid in every respect ; in fact, 

 I was at some loss for a while to fix 

 upon a set of generic characters which 

 -would clearly separate it from all the 

 present genera of Tabanidae. The vena- 

 tion is normal ; the antennae resemble 

 Pangonia in shape and number of an- 

 nulations ; the face is that of Chrysops. 

 The upper corner of the eye, making 

 an angle of about 70 degrees, and not 

 in the least rounded off at the tip, but 

 rather produced a little in a very fine 

 point, beyond which is an impressed 

 line, running to the occiput, is one of 

 the best .characters. The general pro- 

 portions of the body, also, are different 

 from those of any other members of the 

 family known to me. 



Its habits are unknown, but from its 

 appearance the conclusion looks prob- 

 able that it lives like a Hippoboscid 

 upon some bird or mammal. Still, 

 there are no modifications of structure 

 that give strong support to this theory. 

 Its claws are distinctly larger than those 

 of Tabani of its size, and the large pits 

 at the bases of the hairs on the first and 

 second antennal joints seem to indicate 

 an unusual development of the sense of 

 touch in this region ; both of which 

 peculiarities are not without weight. 



Goniops n. gen. 

 Spurs present on hind tibiae, absent from 

 front ones. Eyes narrow, terminating above 

 in an acute angle. Ocelli present. Front 

 broad in female, the callosity longitudinal. 

 Proboscis in repose directed forward. Tho- 

 rax strongly arched, subglobular. Abdomen 

 (from tip of scutellum) not longer than, 

 and head but about half as wide as, the 

 thorax. 



