No. 34-] HEMIPTERA OF CONNECTICUT: PENTATOMIDAE. 767 



than tylus, frena long, and tibiae sulcate above. One species 

 occasionally reaches our territory through commerce. 

 M. histrionica (Hahn). 



Wanz. Ins., ii, 116, fig. 196, 1834. 



Black, conspicuously ornamented with irregular and variable red 

 or pale markings. 



This is the destructive harlequin cabbage-bug, which is common 

 throughout the southern states and has advanced northward to 

 southern Ohio and Long Island. The species has not become 

 established in New England ; one of the two 'specimens so far 

 discovered here was certainly brought in vegetables from the south, 

 the other probably came in a similar manner. 



Meriden, 7 Apr., 1910 (H. L. J.). 



Acrosternum Fieber. 



This genus includes large green species having the juga not, or 

 very slightly, longer than the tylus, first antennal segment not 

 extending beyond apex of head, fifth antennal segment less than 

 twice as long as second, second rostral segment not shorter than 

 the third, orifices with a long tapering canal extending more than 

 half way to pleural margin, and, in common with the succeeding 

 genera, a spine at base of abdomen. 



Key to Species. 



Lateral margins of pronotum arcuate pennsylvanicum 



Lateral margins of pronotum straight hilare 



A. pennsylvanicum (DeGeer). 



Memoires, iii, 330, 1773. 



Green, ventral margins of head, third, fourth, and fifth antennal 

 segments in part, abdominal spiracles, and small marginal spots of 

 connexivum, black ; mesosternum dark. Length 1 5 mm. 



This species is reported to frequent Ceanothus and small oak 

 trees. Only three specimens are known to have been taken in New 

 England. 



Stonington, 30 June, 1914 (I. W. D.). 

 A. hilare (Say). (PL xviii, 17.) 



Ins. of La., 9, 1832. 



Clear green, marked as in the preceding, except that the pro- 

 notal and corial margins are sometimes narrowly pale. Length 

 15-18 mm. 



One of the largest and handsomest Pentatomids of our fauna, 

 occasionally met with in sweeping underbrush in woods, and some- 

 times occurring in large numbers on goldenrod. 



Westville, 10 Sept., 1904, 2 March, 1915 (W. E. B.) ; New Canaan, 15 

 Sept., 1905 (B. H. W.), 16 Sept., 1915 (I. W. D.) ; Poquonock, 27 June, 

 1905 (H. L. V.); New Haven, 23 June, 1905 (B. H. W.), 7 Sept., 1910 

 (D. J. C), 19 Oct., 1911 (W. E. B.), 30 July, 1911 (A. B. C), 25 June, 



