REPORT OF THE STATE ENTOMOLOGIST I918 



237 



on Long Island and has been reported from the Pacific coast. The 

 midges complete their transformations in the galls and at the time 

 of emerging, leave the whitish exuviae protruding. They are there- 

 fore easily transported with infested plants. 



Gall. A more or less irregular, oval swelling of the leaf (fig. 53) 

 with an eccentric, oval, clear space excavated by the yellowish larva. 

 There may be very slight elevation of the leaf with an irregular, 

 yellowish or brownish discoloration, the margin of the enlargement 

 being indicated by a darker green. The gall is most easily seen by 

 transmitted light. An infested leaf may contain only one or two of 

 the maggots or there may be half a dozen with a nearly complete 

 destruction of the vital parts of the leaf. 



Male. Length 2 mm. Antennae nearly as long as the body, 

 sparsely haired, reddish; fourteen segments, the fifth (fig. 54a) with 



Fig. 54 Monarthropalpus buxi: a, fifth antennal segment of male, setae 

 not sketched in; b, same of female (enlarged, original) 



stems two and three times their diameters, respectively; three 

 circumfila, the loops rather stout, short and approaching those of 

 Hormomyia. Palpi (fig. 55); one long segment somewhat expanded 

 distally, sparsely setose. Mesono- 

 tum, scutellum and postscutel- 

 lum a variable yellowish orange, 

 the submedian lines sparsely 

 haired. Abdomen sparsely haired, 

 a variable orange, the basal seg- 

 ments lighter, the distal bright 

 orange; genitalia fuscous yellowish. 

 Wings hyaline, costa dark brown, 

 the third vein uniting therewith 

 at the apex. Halteres orange basally, fuscous yellowish distally. 

 Legs a nearly uniform yellowish orange; claws tapering, simple, the 



Fig. 55 Monarthropalpus buxi, 

 palpus of male (enlarged, original) 



