No. 22.] HYMENOPTERA OF CONNECTICUT. 1 57 



not reaching the occiput; clypeus truncate; saw-guides with 

 dorsal and ventral margins converging, the apex bluntly- 

 pointed. Male differs in having rufous part of thorax inclined 

 to whitish and extending over entire pleurae, venter of abdo- 

 men, and a broad band on lateral part of dorsal aspect, broader 

 behind, sometimes fused on meson, whitish. Length 3 to 4 

 mm. Larva mines leaves of Cratcegus and Prunus. 



Messa Leach. 

 °M. ambigua (Norton). Fenusa ambigua Norton. 

 Black, with the two basal segments of the antennae, the pro- 

 thorax entirely, the tegulae, the legs entirely, the abdomen for 

 the most part (sometimes infuscated at apex), white; antennae 

 with the second segment elongate, the first and second 

 together subequal to the third in length, the third longer than 

 the fourth ; wings hyaline, hairy, the veins and stigma brown- 

 ish ; saw-guides straight above, rounded below and at apex to 

 a point above. Length 3.5 mm. 



Kaliofenusa MacGillivray. 

 °K. ulmi (Sundewall). Kaliosysphinga ulmi Sundewall. 

 Black, except legs beyond the knees, which are brownish; 

 hypoclypeal area convex, abrupt in front ; clypeal furrow prom- 

 inent, not interrupted by the clypeal area ; front elevated, with 

 a broad, shallow median fovea, as broad as the area between 

 the antennae; antennal furrows extending from the tentorial 

 invaginations almost to the occiput, deep and narrow as far as 

 the anterior ocellus, separated from the occiput by a narrow 

 wall; wings almost hyaline, infuscated along the veins. 

 Length 3.5 mm. Larva mines leaves of the European and 

 American elms. 



Fenusa Leach. 

 °F. dohrnii (Tischbein). Kaliosysphinga dohrnii Tischbein. 

 Black, except legs beyond the knees, which are fuscous; 

 head without a distinct furrow between the ocellar and posto- 

 cellar areas; antennal furrow not expanded into a large pit 

 opposite the middle of the front, and with two distinct tooth- 

 like indentations on the median side; saw-guides with the 



