42 
cooler. As it is not known to bite it has little interest for our 
present purpose. 
S. venustoides Hart, n. sp. (Figs. 13-15).—A second new spe¬ 
cies, allied to S. venustum, is in the Nason collection from Algon¬ 
quin, Ill. It is represented by specimens taken May 4 and 7, July 
8, September 7, and October 17, 20, and 24, from plants along 
a creek, in pastures and gardens, and on vacant lots. This is 
clearly a several-brooded species, breeding in small streams. 
The following description of S. venustoides is by Mr. C. A. 
Hart. 
Male .—Body black. Eyes contiguous, the lower parts sharply 
differentiated as usual, its facets only about half the diameter of 
those of the upper parts. Antennae black, with rather closely-set 
minute white pile; face gray pollinose, with sparse whitish hairs; 
palpi black, with sparse whitish hairs. 
Fig. 13. Fig 14. Fig. 15. 
Figs. 13-15. Simtilium veiiustoides'. Fig. 13, front of head (x 35); Fig. 14, head and thorax of 
male (x 22); Fig. 15, right hind leg of male (x 23). 
Thorax with sparse whitish vestiture; mesonotum velvety 
black, a pair of parallel white pollinose stripes anteriorly (Fig. 
14), separated by about one third the width of the mesonotum, 
their anterior ends curving down on the sides near the anterior 
margin; space between the stripes and along their outer side some¬ 
times brownish gray pollinose; a broad white pollinose lateral and 
posterior border, with silvery reflections, often connected ante¬ 
riorly with the lateral extensions of the dorsal stripes; posterior 
border widened forwards into a broad median lobe, vaguely 
emarginate. Scutellum black, sides white pollinose, with a few 
long white hairs; metanotum white pollinose. 
