THE CANADIAN ENTOMOLOGIST ' 71 



polished and with minute punctures, thoracic constriction minutely tuberculate, 

 anterior half of propodeum smooth and polished dorsally, posterior half densely 

 and minutely punctate. Abdomen smooth and polished. Thorax with few 

 scattered hairs, these more numerous ventrally. 



Described from five specimens collected by E. D. Ball, Ames, Iowa, July 

 25, 1919. This species was found associated with Balclutha impicta \'an Duzee 

 nymphs and was probably parasitic on this insect since this was by far the most 

 abundant species of leafhopper on an annual species of Paniciini. Owing to 

 the large series of specimens the writer was able to dissect for the character of 

 the mouth parts and the maxillary palp was found to be very short and two- 

 jointed. This fact places this species in the genus Epigonatopus Perkins in 

 which there are but two species described, solitarius and fallax from Australia. 



Gonatopus agropyrus, n. sp. 



Female. — Comes nearest to bicolor Ashm. but dififers especially in colour 

 of abdomen. Length 2 mm. Testaceous, except basal three joints of antenna? 

 and abdominal petiole which are fuscous. Abdomen varies from partly to 

 entirely fuscous. Antennae short, slightly longer than head. Head and pro- 

 thorax smooth and polished, thoracic constriction and central elevated part of 

 propodeum minutely punctate, anterior part of propodeum rugose, posterior 

 part distinctly transversely aciculated. Abdomen smooth and polished. 



Male. — Length 2.3 mm. Black, body covered with fine scattered hairs; 

 antennae as long as head and thorax together, pubescent. Maxillary palpi 

 extending almost to posterior margin of head, with three joints visible; mandibles 

 fuscous. Antennal joints 1 and 2 subequal, together being slightly shorter 

 than 3; 3, 4, 5 and 6, subequal, each succeeding joint slightly shorter than 

 preceding; 7-10 shorter, subequal. Ocelli all visible from above. Prothorax 

 not visible from above; eyes pubescent; mesothorax shining and very finely 

 reticulate. Parapsidal furrows distinct, converging and meeting at posterior 

 margin of mesothorax; scutellum much shorter than mesonotum, smooth and 

 polished; propodeum distinctly rugose. Wings hyaline, and clothed with fine 

 hairs. Venation pale, radius curved, extending almost to margin of wing. 



Described from one male and two females reared from Deltocephalus affinis 

 nymphs collected by the writer at Ames, Iowa, July 19 and September 25, 1919. 



A female reared from Deltocephalus affinis adult collected by the writer at 

 Ames, Iowa, September 24, 1919, is apparently the same species. In coloration 

 and body sculpture it is practically identical but it is somewhat larger, measuring 

 3 mm. in length. 



Gonatopus similis, n. sp. 



Female. — Resembles mimoides Perkins but dififers in character of thoracic 

 and propodeal sculpturing. Length 3 mm. Testaceous, except basal two 

 joints of antennae, vertex around ocelli, petiole, and posterior half of abdomen 

 which are fuscous to black. Antennae long, two to three times length of head. 

 Head and prothorax smooth and polished. Thoracic constriction minutely 

 tuberculate, propodeum finely reticulately sculptured. Abdomen smooth and 

 polished. Thorax and abdomen with scattered hairs. 



Described from a single specimen reared from Deltocephalus affinis nymph 

 collected July 24, 1919, at Ames, Iowa. 



