INJURIOUS AND BENEFICIAL INSECTS OP CALIFORNIA. 353 



THE RASPBERRY HORNTAIL 



Hartigia cressoni (Kirby) (Family Siricidse) 

 I Hartigia abdominalis Cresson) 



(Figs. 319-351) 



Description. — The adults arc slender wasp-like insects, little more 

 than | inch long and very active fliers. The females are yellow with 

 dark markings, while in the males black predominates, with very little 

 yellow. The eggs are pearly-white and oblong with a curved point at 

 one end. The full-grown larva- are white will) dark heads and tip- 



Fig. 349. — Tin- raspberry horntail, Hartigia cressoni (Kirby), a, 



adult female; b, adult male; c, pupa; .1. first-stage papa; e. and f, 

 larva?. Enlarged two and one half tines. (Author's illustration, 

 Mo. Bui. Cal. Hort. Com.) 



ends are nearly 1 inch long. They are almost the shape of the letter 



"S" and have a very noticeable point at tin- tail end. The pupae vary 

 from the color and shape of the larva- to those of the adults. 



Life History. — The winter is passed within the canes of the host 

 plants in the larval and pupal stages. The adults emerge in April 

 23— 136G4 



