367 
Head broadly rounded in front. Ocelli present. Eyes large, finely 
faceted. Pterothorax wider than prothorax. Wings large, reaching 
base of tube; color light gray-brown, spotted with darker. 
Male (Forma brachyptera).—-Similar to female, but smaller (length 
about 1.4 mm.). Prothorax about as long as head. Fore tarsi armed 
with a slightly larger tooth. Abdomen slender, tapering more gradually 
to apex. 
Described from several specimens from Carbondale, Homer, and 
Urbana, Illinois, taken under bark on rotten stumps. 
Trichothrips angusticeps sp. nov. (Fig. 4). 
Female —Length about 1.4 mm. General color brownish yellow 
with considerable maroon-colored hypodermal pigmentation; head, pro- 
thorax, sides of abdomen, and tip of tube slightly darkened with brown- 
ish black. 
Similar to T. americanus sp. nov., differing from it as follows: 
Head fully 1.4 times as long as wide; cheeks paral- 
lel; postocular bristles knobbed. Antenne 1.7 times 
as long as head, nearly concolorous with darker parts 
of body, excepting segments 1 and 2, and basal half 
of 3, which are paler. Mouth cone considerably sur- 
passing base of prosternum; labrum surpassing labium 
by twice the length of the maxillary palpus. 
Prothorax about .7 as long as head; all spines pre- = 
sent, long, knobbed. Legs yellow, all femora shaded 
shightly with brownish. : 
Abdomen rather slender; tube .6 as long as head. Fic. 4 
hee : Trichothrips angus- 
Measurements:— Total length 1.44 mm.; head, eb f Ganiale: 
length .22 mm., width .16 mm.; prothorax, length eee 
.16 mm., width (including coxe) .34 mm.; ptero- Pinror Sekt aa 
thorax, width .30 mm.; abdomen, width .42 mm.; tube, eee a ak ae 
length .14 mm., width at base .081 mm., at apex .038 del.) 
nome Adafenna> 1, Si n> 2, 49 4: 3, 53-5 4, 50 wey 5; 
Daw. 0) SO 1 48.0. 8,00 a5 total, =~ 38mm: 
Male.—Similar to female, but smaller (length about 1.25 mm.). 
Prothorax five-sevenths as long as head. 
Described from eight brachypterous specimens, one of which is a 
male, taken under bark on rotten stumps, at St. Joseph and Urbana, 
Tllinois, by Mr. C. A. Hart and the writer. 
