156 Triogma Trisulcata Schum. and other Yorkshire Dip ter a. 
Stenus fulvicornis S. (paganus Er.). By sweeping vegetation. 
S. bifoveolatus Gy. In Sphagnum, sparingly. 
Lathrimcsum unicolor Mm. In dead leaves, etc., common. 
Bythinus puncticollis Dy. One in moss. 
Myrrha 18 -guttata L. Beaten from various bushes. 
Exochomus 4-pustulatus L. One specimen crawling up a birch trunk. 
Brachypterus pubescens Er. ( glaber S.). On nettles. 
Epurea pusilla II. Beaten from sallow and other bushes. 
Cerylon histeroides F. Under bark of various trees. 
Enicmus minutus L. Common in the sweeping net. 
Prasocuris junci Bm. On brooklime in a small stream. 
Rhynchites longiceps Th. ( harwoodi Jy.). On birch, etc. 
Apion striatum K. A few on broom. 
A spencei K. Common by sweeping. 
Phytonomus plantaginis D.G. Sparingly by sweeping. 
Micrelus ericce Gy. Abundant on heather. 
TRIOGMA TRISULCATA Schum. AND OTHER 
YORKSHIRE DIPTERA. 
CHRIS. A. CHEETHAM. 
Amongst the Limnobids, one of the smallest sub-families is 
that of Cylindrotominse, of the four genera, each consisting of 
a single species, two are fairly well known in Yorkshire. By 
some mischance Wingate omitted Triogma in his analytical 
keys, although it is in those of Schiner on which most of 
Wingate’s work is based. I caught a single male at Thieves’ 
Moss on May 23rd. Dr. F. W. Edwards informs me that he 
only knows a single specimen from Coughton Marsh besides 
those taken by A. E. Carter at Blairgowrie, all these were 
caught during the first two weeks of May. Subsequent visits to 
the Austwick locality have not been successful and probably 
the beginning of May would have been a more hopeful time. 
Another addition to our diptera list is Empis borealis L. 
I found this flying in a clearing in a pine wood at Eldroth on 
May 18th. A week later the opening blooms of the Globe 
flower, Trollins europceus, gave an opportunity to collect 
Chiastochceta trollii, Zett. in great numbers wherever the 
flower was found, it has not been previously recorded for 
Yorkshire. Lastly, on a visit to Pennyghent on May 13th 
Dr. Edwards caught Metriocnemus tristellus Edw., a species 
he described in his paper on British Non-biting Midges. 
Trans. Ent. Soc., 1929, from specimens taken in Cambs. 
and Herts. 
On May 21st I visited a small chalk quarry a,t the top of Elloughton 
Dale, which lies one mile east of South Cave. To my surprise I dis- 
covered four examples of the echinoderm Infulaster excentricus (Forbes). 
One specimen in particular was extremely well preserved. The quarry 
is in the zone of Holaster planus. The finding of several specimens of 
such a rarity in close proximity seems worthy of placing on record. — • 
Robert M. Stainforth. 
The Naturalist 
